Taiwan Security Monitor

Author: Ethan Connell

Strait Snapshot, July 2026 Update

strait snapshot

After the Storm

Authors: Ethan Connell & Jonathan Walberg

KEY FINDINGS

  • Taiwan’s Ministry of National Defense documented 260 PLA aerial sorties around the island in July 2026, with 190 entering the Air Defense Identification Zone. The total rose 25 percent from June’s 208 to the second-highest month of the year, while remaining 53 percent below July 2025’s 555 sorties. The seven-month sequence reads 270, 190, 173, 229, 274, 208, 260.
  • The PLA conducted three joint combat readiness patrols on July 8 (28 aircraft, 20 ADIZ entries), July 24 (29 aircraft, 17 ADIZ entries), and July 30 (27 aircraft, 22 ADIZ entries), restoring the patrol cadence that had dropped to a single operation in June. Typhoon Bavi suppressed activity from July 9 through 14, during which only 11 aircraft were detected, and PLAN vessel counts fell to one on consecutive days.
  • PLAN vessel detections averaged 6.9 per day and peaked at 10, remaining within the five-to-nine baseline. Official and government-ship detections totaled 116 for the month, comparable to June’s 110 and well above the 46 recorded in May.
  • The Coast Guard Administration documented seven PRC government-vessel incursions in July: five into Kinmen restricted waters (July 8, 14, 16, 21, and 29), including a nighttime transit by PRC Maritime Safety Administration vessel Haixun 1630 on July 16, the first non-CCG government ship recorded in the series; and two east-of-Taiwan patrol reports (July 4 and 31), confirming the Xiushan formation’s rotation into a standing presence east of the island. Cumulative 2026 incursions reached 42.

Air Activity: Rebound from the June Dip

July’s 260 detected sorties reversed the pullback that had brought PLA air activity to its second-lowest month of the year in June. The 52-sortie increase returned the count above April’s 229 and close to January’s 270, though still well below the May peak of 274. Against July 2025’s 555 sorties, the shortfall was 53 percent, and against July 2024’s 607, it was 57 percent, consistent with the year-on-year suppression that has defined 2026.

Three joint combat readiness patrols accounted for the month’s three largest single-day totals: 29 aircraft on July 24, 28 on July 8, and 27 on July 30. The July 2 long-distance flight of 30 aircraft was the month’s single busiest day but carried no patrol designation. Five days registered zero aircraft, four of them clustered in the Typhoon Bavi window between July 10 and 17.

Typhoon Bavi’s passage across the strait between July 9 and 14 produced the sharpest disruption to air activity recorded in 2026. Over six days, only 11 aircraft were detected, and PLAN vessel counts dropped to one on July 10 and 11, the lowest daily figures in the dataset. Activity resumed immediately: the July 14 post-storm CCG incursion into Kinmen waters and the 6-aircraft detection that day marked the start of a sustained late-month recovery that carried through the July 24 and 30 patrols.

Figure 1. Daily PLA aerial activity around Taiwan, July 2026. Gold stars mark joint combat readiness patrols on July 8, 24, and 30; the shaded band denotes the Typhoon Bavi disruption window.

Monthly Trajectory: The Sawtooth Continues

July’s rebound from June extended the sawtooth-like rhythm that has characterized 2026: 270, 190, 173, 229, 274, 208, 260. Each uptick (April, May, July) has been followed or preceded by a downtick, and no month has sustained the pace of either 2024 or 2025. The three JCRPs in July matched January’s four and May’s four as the months with the highest patrol frequency, while June’s single patrol remains the year’s low.

Figure 2. Monthly PLA aerial activity sortie totals, 2024–2026. July 2026 rebounds from June but remains far below the 2024 and 2025 comparables.

At Sea: Bavi Disrupts the Baseline

Naval presence held within the five-to-nine band for most of July, with a daily average of 6.9 PLAN vessels and a peak of 10, but the Typhoon Bavi window broke the pattern. PLAN detections dropped to one vessel on both July 10 and 11, the only single-digit-low readings in the 2026 dataset. By July 12, the count had recovered to five and by month’s end reached 10, restoring the baseline.

Official and government-ship detections totaled 116 for the month, roughly flat against June’s 110 and confirming that the step-change from May’s 46 has held. The highest single-day official-ship count was 10 on July 12, a day with zero aircraft. No allied Taiwan Strait transits were recorded in July; the last logged transit was the Netherlands frigate HNLMS De Ruyter on June 5.

Figure 3. PLAN vessel and official-ship detections around Taiwan, July 2026. The shaded band marks the Typhoon Bavi disruption.

Coast Guard Gray Zone Operations

July’s seven PRC government-vessel incursions were fewer than June’s eleven and geographically narrower, but introduced a new actor. Five operations targeted Kinmen restricted waters, conducted on July 8, 14, 21, and 29 by standard four-ship CCG formations drawing on hulls 14530, 14532, 14533, 14602, 14605, 14606, and 14607, with the pre-storm July 8 and post-storm July 14 incursions sharing three of four hull numbers. The July 29 operation employed a two-axis pincer entry, with pairs approaching simultaneously from east of Liaoluo and southwest of Damaoshan.

The July 16 incursion was anomalous. Haixun 1630, a PRC Maritime Safety Administration vessel rather than a China Coast Guard cutter, transited Kinmen restricted waters at night, entering five nautical miles southeast of Liaoluo at 20:44 and exiting southwest of Shaxi Fort at 22:54. The CGA described it as an “edge-cutting transit” and noted it was the first recorded incursion by a non-CCG PRC government vessel. As of July 16, the CGA counted 24 CCG intrusions into Kinmen waters in 2026.

East of Taiwan, the Xiushan formation (CCG 2305 and CCG 1401 Chongming) relieved the Daishan formation on July 4, 54 nautical miles east of Hualien, and remained on station through July 31, when CCG 2305 was reported drifting 151 nautical miles east of Lanyu. The CGA deployed frigates Bali, Hualien, and Taipei for continuous monitoring across the month. The standing rotation confirms that the east-of-Taiwan patrol declared in June has become an institutionalized presence.

Figure 4. CCG incursions into Taiwan’s near seas, January–July 2026, by location. July reverts to a Kinmen-dominant pattern after June’s six-geography breakout, while the east-of-Taiwan patrol line continues.

The Full Picture: Multi-Domain Overview

Figure 5. January–July 2026 multi-domain PLA activity: air sorties, naval presence, and CCG incursions. The shaded band in July marks the Typhoon Bavi disruption. Inverted triangles atop the air panel mark allied Taiwan Strait transits.

July’s data reinforces the observation that air activity fluctuates while naval presence holds a persistent baseline and coast-guard operations follow their own institutional rhythm. The Typhoon Bavi window is the starkest illustration: air sorties and PLAN detections both cratered, but the CCG conducted incursions on either side of the storm, and the east-of-Taiwan formation remained on station throughout. Across seven months, the overall multi-domain posture has not meaningfully decreased from the level sustained since August 2022.

Figure 6. July air activity year-over-year: total sorties and ADIZ entries, 2024–2026.

Methodology & Sources

Air and naval detection data are drawn from the PLA Activity Center database maintained by the Taiwan Security Monitor, which compiles daily press releases issued by Taiwan’s Ministry of National Defense. The PLA Activity Center data are complete through July 31, 2026. Coast Guard incident data are compiled from Coast Guard Administration gray-zone press releases (cga.gov.tw) and verified against contemporaneous media reporting. Allied Taiwan Strait transit records are drawn from the Taiwan Strait Transit Tracker maintained by the Taiwan Security Monitor; no allied transits were recorded in July 2026. “ADIZ” denotes Taiwan’s Air Defense Identification Zone; “median line” refers to the informal centerline of the Taiwan Strait historically observed by both sides; “JCRP” denotes Joint Combat Readiness Patrols as designated by Taiwan’s MND. All analysis and commentary are by the Taiwan Security Monitor.

Strait Snapshot, June 2026 Update

strait snapshot

The Gray Zone Widens

Authors: Ethan Connell & Jonathan Walberg

KEY FINDINGS
  • Taiwan’s Ministry of National Defense documented 208 PLA aerial sorties around the island in June 2026, with 134 entering the Air Defense Identification Zone. The total fell 66 sorties, or about 24 percent, from May’s year-high 274, and sat 58 percent below June 2025’s 499 sorties. June ranks fourth among 2026’s six months in the sequence 270, 190, 173, 229, 274, 208.
  • The PLA conducted a single joint combat readiness patrol on June 3 (32 aircraft, 25 ADIZ entries), down from four in May. The month’s second-largest day, 23 aircraft on June 21, was a “long-distance flight” rather than a patrol, and the tempo was otherwise sustained through dispersed median-line crossings instead of large set-piece operations.
  • PLAN vessel detections averaged 7.4 per day and peaked at 10, holding the five-to-nine vessel baseline, while official and government-ship detections more than doubled to 110 for the month against May’s 46, a maritime-presence signal that ran counter to the decline in the air. One allied Strait transit fell within the month, the Netherlands frigate HNLMS De Ruyter on June 5.
  • The Coast Guard Administration recorded 11 China Coast Guard incursions in June, the highest monthly count of 2026 and the first to break the Kinmen-and-Dongsha pattern: alongside four Kinmen and two Dongsha operations, the CCG conducted two east-of-Taiwan patrols, a South China Sea approach at Taiping Island, and Taiwan’s first recorded incursion off Penghu. Cumulative 2026 incursions reached 34.

After the High-Water Mark

June’s 208 detected sorties reversed the climb that had carried PLA air activity to a 2026 high in May. The month-on-month drop of 66 sorties returned the count to the middle of the year’s range, below April’s 229 and well beneath May’s 274, and left the six-month sequence reading 270, 190, 173, 229, 274, 208. Against June 2025’s 499 sorties, the shortfall was 58 percent, consistent with the suppressed year-on-year pattern that has held across 2026.

Joint combat readiness patrols, a firmer indicator of operational intent than raw sortie counts, all but disappeared. Only the June 3 patrol, 32 aircraft with 25 crossing into the ADIZ and the month’s single largest day, was officially given the designation, against four such patrols in May. The June 21 long-distance flight of 23 aircraft was the next-largest day, and the remaining elevated days took the form of dispersed median-line crossings recorded on June 22, 23, 24, and 30 rather than concentrated multi-axis exercises. 7 days registered no aircraft at all, including an unbroken stretch of quiet from June 14 through June 17.

Figure 1. Daily PLA aerial activity around Taiwan, June 2026. The gold star marks the June 3 joint combat readiness patrol; red bars show aircraft entering the ADIZ; shaded columns denote zero-detection days. The purple marker denotes the June 5 HNLMS De Ruyter (Netherlands) Strait transit.

The pullback followed the May 14-15 Beijing summit and the cautious posture Washington adopted afterward. U.S. arms deliveries to Taiwan remained paused, a planned Trump-Lai conversation stayed on hold, and the reciprocal autumn Xi visit to the United States had yet to be scheduled. As in earlier months, a lighter month in the air should not be read on its own as an easing of pressure. ADIZ-penetration share held at roughly 64 percent of detected sorties, so the activity that did occur still pressed toward Taiwan’s southwestern approaches rather than skirting them.

Monthly Trajectory: The Rebound Stalls

May’s rebound did not carry into June. Whereas the spring recovery had restored a near-weekly patrol cadence, June returned to a single large-scale operation, the type of frequency last seen during the February-April lull, while total sorties stayed comparatively high at 208. That combination is the month’s central puzzle: activity remained substantial, but the concentrated readiness patrols that signal deliberate demonstration gave way to a more routine presence and long-range flights. Read against the full run of 2026, June looks less like renewed de-escalation than like a redistribution of effort away from the air.

Figure 2. Monthly PLA aerial activity sortie totals, 2024–2026. June 2026 falls back from May’s year high while remaining far below the 2024 and 2025 comparables.

At Sea: The Baseline Holds, Official Traffic Doubles

Naval presence again refused to track the swings in the air. PLAN detections averaged 7.4 vessels daily and peaked at 10, squarely within the five-to-nine band that has defined 2025-2026 operations, and the decoupling between air and maritime domains held through a month in which sorties fell by nearly a quarter. Air activity appears responsive to political calendars and institutional dynamics, whereas naval presence functions as a persistent baseline feature of cross-strait military activity.

Figure 3. PLAN vessel and official-ship detections around Taiwan, June 2026. Official-ship traffic more than doubled month-on-month. The purple marker denotes the June 5 HNLMS De Ruyter Strait transit.

The exception was official and government-ship traffic, which more than doubled to 110 detections for the month against 46 in May, peaking at ten government vessels on June 9, a day with no aircraft at all. The surge in non-navy state shipping, coming as air activity receded, reinforces the sense that Beijing shifted weight toward maritime and constabulary presence in June. One allied transit occurred: the Netherlands frigate HNLMS De Ruyter passed through the strait on June 5, the fifth allied transit of 2026 and the first by a Dutch vessel, following U.S., Australian, Japanese, and Canadian passages earlier in the year.

Coast Guard Gray Zone Operations

The clearest escalation in June came below the waterline. The Coast Guard Administration documented at least 11 China Coast Guard incursions, more than double any previous month in 2026 and the first to move decisively beyond the established Kinmen-and-Dongsha rhythm. Four Kinmen operations, on June 3, 16, 18, and 29, maintained the institutionalized four-cutter rotation drawing on hulls 14530, 14531, 14602, 14606, and 14607, including a June 18 approach in which the cutters ran in single file with their transponders switched off. Two Dongsha operations, on June 5 and 19, preserved the once-monthly southern pattern with single large cutters.

Figure 4. CCG incursions into Taiwan’s near seas, January–June 2026, by location. Filled markers are logged in the TSM tracker; hollow markers are confirmed from CGA releases and pending entry. June’s activity spans six distinct geographies, the year’s widest.

What set June apart was geography. On June 11, a Sansha law-enforcement formation entered waters two nautical miles off Taiping Island, extending gray-zone pressure into the South China Sea. On June 19 the CCG mounted Taiwan’s first recorded incursion off Penghu, sending cutter 2102 into waters west of Huayu the day after Taiwan’s Coast Guard seized an illegal mainland fishing vessel, a pretextual patrol shadowed by the CGA cutter Lianjiang. Most consequential were two patrols east of Taiwan: the June 1 formation that declared law-enforcement jurisdiction some fifty nautical miles southeast of Orchid Island, the first such assertion in open Pacific waters, and a June 13 transit past Green Island during which cutter 2502 broadcast that “the ROC does not exist” before a CGA vessel intervened. Cumulative 2026 incursions reached 34.

Regional Context: East of Taiwan, a New Patrol Line

June confirmed that the east-of-Taiwan patrols flagged at the end of May were not a one-off. By declaring law-enforcement jurisdiction in the open Pacific and rotating formations to sustain it, with the Xiushan task force relieving the June formation in early July, the CCG began to institutionalize a presence on Taiwan’s Pacific flank, the approaches through which any allied resupply from Guam, Yokosuka, or Luzon would run. Conducted under a civilian flag, the patrols are calibrated to complicate an allied response without the escalation a naval deployment would carry. Taipei answered on both fronts: the Coast Guard Administration pledged to expel harassing vessels and advised Taiwanese ships to ignore any boarding demands, while the Republic of China Navy stood up a Littoral Combat Command on June 1 to consolidate its surveillance and anti-ship missile forces. Washington’s posture, by contrast, stayed cautious in the summit’s aftermath even as Congressional support for Taiwan held.

The Full Picture: Multi-Domain Overview

Figure 5. January–June 2026 multi-domain PLA activity: air sorties, naval presence, and CCG incursions. The gold band marks the early-March Two Sessions quiet period; the shaded June column marks the month’s air pullback and gray-zone surge. Inverted triangles atop the air panel mark allied Taiwan Strait transits (United States, January 16; Australia, February 20; Japan, April 17; Canada, May 22; Netherlands, June 5).

June is the sharpest illustration to date of a posture that moves along several tracks at once. Air activity, the most visible and politically responsive domain, fell back from its May peak and shed nearly all of its set-piece patrols; naval presence did not move; official-ship traffic and coast-guard operations rose, the latter both in number and in geographic reach. Taken together, the month does not describe a de-escalation so much as a shift in where pressure is applied, from the air toward the maritime and constabulary domains, and from the strait’s familiar flashpoints toward Taiwan’s eastern and southern approaches. The overall multi-domain posture continues to reflect the sustained PLA activity around Taiwan maintained since August 2022.

Figure 6. June air activity year-over-year: total sorties and ADIZ entries, 2024–2026.

Methodology & Sources

Air and naval detection data are drawn from daily press releases issued by Taiwan’s Ministry of National Defense and compiled in the PLA Activity Center database maintained by the Taiwan Security Monitor. Figures for June 1-21 are drawn from the PLA Activity Center; figures for June 22-30 are compiled from MND daily releases, which do not carry the joint-patrol labeling used earlier in the month. Coast Guard incident data are compiled from Coast Guard Administration statements and verified against contemporaneous media reporting in the China Coast Guard Incident Tracker Database; seven of June’s incursions appear in the tracker, and four are confirmed from CGA releases pending entry, so the monthly total should be read as a minimum. Allied Taiwan Strait transit records are drawn from the Taiwan Strait Transit Tracker maintained by the Taiwan Security Monitor. “ADIZ” denotes Taiwan’s Air Defense Identification Zone; “median line” refers to the informal centerline of the Taiwan Strait historically observed by both sides; “JCRP” denotes Joint Combat Readiness Patrols as designated by Taiwan’s MND. All analysis and commentary are by the Taiwan Security Monitor.

© 2026 Taiwan Security Monitor. All rights reserved.

PLA Activity Update, 6/14/26

Author: Ethan Connell

Visualization of PLA activity around Taiwan covering June 8th through June 14th.

For more information, visit the PLA Activity Tracker.

PLA Activity Update, 6/7/26

Author: Ethan Connell

Notes:

  • All data from Taiwan’s MND / TSM’s PLA Activity Center
  • Percentage increases/decreases represent change from week to week.
  • Detection frequency refers to the number of times an airframe type is mentioned in updates, not the total number of aircraft sorties per airframe type.
  • “Official vessels” refers to China Coast Guard vessels and official PRC research ships.

More information at the PLA Activity Tracker.

Strait Snapshot, May 2026 Update

strait snapshot

In The Summit’s Shadow

Authors: Ethan Connell & Jonathan Walberg

KEY FINDINGS
  • In May 2026, Taiwan’s Ministry of National Defense recorded 274 PLA aerial sorties around the island. Of these, 216 entered Taiwan’s Air Defense Identification Zone, representing an ADIZ-penetration rate of approximately 79 percent, the highest in 2026. This monthly total is the largest of the year, surpassing January’s 270 and continuing April’s rebound, signaling the end of the first-quarter lull. However, it remains 40 percent below the 458 sorties recorded in May 2025.
  • The PLA conducted four joint combat readiness patrols on May 1, May 6, May 19, and May 25, restoring the four-per-month cadence last observed in January. Single-day totals peaked at 29 aircraft on both May 1 and May 25. Air activity dropped to zero on May 14 and 15, coinciding with the Trump-Xi summit in Beijing, before surging during the May 19 and May 25 patrols.
  • PLAN vessel detections averaged 6.7 per day in May, peaking at 10 on May 21, consistent with the five-to-nine vessel baseline maintained since 2025. While air activity reached a yearly high, naval presence remained steady, continuing the decoupling between sortie volume and naval activity observed throughout the year. One allied Strait transit occurred: HMCS Charlottetown on May 22, between two late-month patrols, marking the latest instance of a transit coinciding with heightened patrol activity in 2026.
  • The Coast Guard Administration recorded five CCG incursions in May (four at Kinmen, one at Dongsha), restoring the once-monthly Dongsha pattern that lapsed in April. From January through May, cumulative incursions totaled 23: 19 at Kinmen and 4 at Dongsha. This increase occurred during a month focused on the May 14-15 Trump-Xi summit in Beijing, after which Washington paused arms transfers and deferred a Trump-Lai call ahead of a planned autumn visit by Xi to the United States.

In the Summit’s Shadow

PLA air activity around Taiwan reached its highest monthly level of 2026 in May, with 274 detected sorties, 216 of which entered Taiwan’s Air Defense Identification Zone. This total surpassed April’s 229 by 45 and exceeded January’s 270, making May the peak month so far. The five-month sequence is 270, 190, 173, 229, and 274, with March as the low point and activity rising for a second consecutive month. However, May’s total remains 40 percent below the 458 sorties of May 2025, and 2026 overall is still well below the previous year.

Four joint combat readiness patrols occurred on May 1, May 6, May 19, and May 25. The first and last patrols each involved 29 aircraft, with the May 25 count being the second-highest single-day total of 2026. Between patrols, activity followed a familiar pattern of alternating high-intensity demonstrations and quiet days. May saw four zero-detection days: May 5, May 14, May 15, and May 31. Notably, May 14 and 15 coincided with the Trump-Xi summit in Beijing, during which PLA air activity around Taiwan ceased entirely. Despite these pauses, May produced the year’s highest total, with an ADIZ-penetration rate of about 79 percent, indicating that more daily activity entered Taiwan’s southwestern ADIZ rather than remaining outside it.

Figure 1. Daily PLA aerial activity around Taiwan, May 2026. Gold stars mark JCRP days; red bars show aircraft entering the ADIZ. The green band marks the May 14-15 Trump-Xi summit in Beijing, when PLA air activity fell to zero. The purple marker denotes the May 22 HMCS Charlottetown (Canada) Strait transit, which fell between the May 19 and May 25 patrols.

May’s activity should be viewed in context. President Trump and President Xi Jinping met in Beijing on May 14 and 15, during which PLA air activity around Taiwan dropped to zero, marking the only consecutive shutdown of the month. Activity then increased for the May 19 and May 25 patrols, making the summit period a quiet interval between two surges. Naval presence remained steady during these days, indicating the stand-down was limited to the air domain. Diplomatic developments continued after the summit. At the Shangri-La Dialogue on May 29, U.S. Secretary of Defense Pete Hegseth stated that the pause in Taiwan arms deliveries was not due to munitions conservation related to the Middle East. Late in the month, reports indicated a planned Trump-Lai call was postponed, and Trump was not expected to speak with Lai before a reciprocal Xi visit to the United States in the autumn. The PLA ended May with its highest air activity of 2026, even as Washington’s signals shifted toward Beijing.

Monthly Trajectory: The Lull Reverses

May’s 274 sorties mark a full reversal of the first-quarter decline. The 2026 monthly totals form a V-shaped pattern: 270, 190, 173, 229, and 274, with March as the low point and a climb above January’s starting figure. April signaled the end of the lull, and May confirms a sustained recovery, with gains extending beyond any single exercise period.

Figure 2. Monthly PLA aerial activity sortie totals, 2024–2026. May 2026 is the year’s high, completing a V-shaped recovery from the March low.

JCRP frequency is a more reliable indicator of PLA intent than total sortie counts, and it rebounded in May. The four patrols matched January’s level and exceeded the two conducted in each of February, March, and April. Holding roughly one large-scale exercise per week for the first time since January suggests the first-quarter drop in routine sorties was temporary, not a reduction in the PLA’s readiness for high-intensity demonstrations. JCRP frequency, more than total sorties, signals the end of the early-year lull.

At Sea: A Baseline That Does Not Move

PLAN vessel detections averaged 6.7 per day in May, peaking at 10 on May 21. Both figures remain within the five-to-nine vessel range that has characterized PLAN presence since 2025. In contrast, aerial sorties reached a yearly high, and ADIZ penetration peaked in 2026, while naval presence remained unchanged. The air and naval domains operate under different dynamics: air activity responds to political events and institutional factors, while naval presence serves as a consistent baseline in cross-strait military activity.

Figure 3. PLAN vessel and official ship detections around Taiwan, May 2026. The purple marker denotes the May 22 HMCS Charlottetown Strait transit.

Official and government-ship detections stayed low through the month, clustering in the first week before settling to one or two per day. The naval baseline held steady during a month of elevated air activity, consistent with the pattern seen all year: a change in air sortie volume, whether the May increase or the March decline, does not signal a matching shift in the maritime posture, which stays decoupled from the air domain.

One allied Taiwan Strait transit fell within the month. The Canadian frigate HMCS Charlottetown (FFH 339) transited the strait on May 22, Canada’s first reported transit of 2026 and the fourth allied passage of the year, after the USS John Finn and the survey ship USNS Mary Sears on January 16, the Australian frigate HMAS Toowoomba on February 20, and the Japanese destroyer JS Ikazuchi on April 17. The May 22 transit fell between the month’s third and fourth joint combat readiness patrols, on May 19 and May 25. The proximity is not limited to May. Through 2026, allied transits have repeatedly coincided with periods of heavy JCRP activity, the January and February passages each within a day of a patrol. The sequencing is inconsistent, since in those two cases the patrol came before the transit rather than after, and the sample stays too small to support a causal reading. The clustering warrants continued observation, not firm inference.

Coast Guard Gray Zone Operations

China Coast Guard activity in Taiwan’s restricted waters returned to its monthly rhythm in May. The CCG conducted 5 documented incursions: 4 around Kinmen, on May 7, May 21, May 26, and May 27, and one at Dongsha on May 23. The Kinmen operations followed the institutionalized pattern seen throughout 2026, a rotating four-cutter formation drawn from a consistent hull pool, with numbers 14530, 14531, 14606, and 14609 recurring most often, entering in the afternoon and leaving within about two hours. The May 26 and May 27 incursions came within a twenty-four-hour span, a tempo the CGA itself flagged as unusual. Cumulative CCG incursions for January through May total 23: 19 at Kinmen and 4 at Dongsha.

Figure 4. CCG incursions into Taiwan’s restricted waters, January–May 2026, by location and vessel count.

The main CCG development in May was the resumption of Dongsha (Pratas) operations. After the once-monthly Dongsha pattern lapsed in April, the May 23 incursion restored it, with a single vessel, hull 3501, detected at 07:25 and entering restricted waters at 08:34. Dongsha operations remain distinct from the Kinmen rotation, involving longer transits, single large cutters instead of four-hull formations, and much longer dwell times. The longest in 2026 was the March 18 incursion, lasting about twenty-five hours. The April pause reflected operational rhythm rather than a binding commitment, and May’s return indicates Dongsha presence is an intentional, though intermittent, aspect of CCG activity. One late-period development warrants continued observation: on May 31, the CCG announced “law enforcement patrols” in waters east of Taiwan in response to Japan and the Philippines, and on June 1, a CCG incursion southeast of Orchid Island involved vessels 2304 and 2502, an area not previously recorded in 2026.

Regional Context: An Arms Pause, Summit Diplomacy, and Taiwan’s Own Build-Up

May’s activity occurred against a backdrop of U.S.-China diplomacy that shaped Taiwan coverage for the month. The Trump-Xi summit in Beijing on May 14 and 15 set the tone. In the following weeks, the pause in U.S. arms deliveries—which Secretary Hegseth did not attribute to munitions conservation—and the postponement of a Trump-Lai call ahead of a planned autumn Xi visit to the United States signaled a Washington approach focused on avoiding friction with Beijing. In response, Taiwan advanced its own procurement. On May 29, the Legislative Yuan approved an initial NT$8.811 billion (about US$259 million) installment for five U.S. weapons systems, including M109A7 self-propelled howitzers, HIMARS, and anti-armor drones. Two days earlier, the House Armed Services Committee’s preliminary version of the FY27 National Defense Authorization Act authorized US$1 billion for the Taiwan Security Cooperation Initiative. Congressional support for Taiwan’s defense remains strong, even as executive-branch deliveries are delayed.

Taiwan’s force development also progressed. On June 1, the Republic of China Navy established a Littoral Combat Command, consolidating naval surveillance and anti-ship missile forces under one headquarters, advancing the distributed, asymmetric posture pursued since 2022. Allied presence operations remained steady: the HMCS Charlottetown transit marked Canada’s entry into a 2026 transit pattern already featuring U.S., Australian, and Japanese passages. These regional developments highlight a growing gap between a cautious U.S. executive approach and the consistent allied presence and Taiwanese self-strengthening. The PLA intensified its air activity in this environment.

The Full Picture: Multi-Domain Overview

Figure 5. January–May 2026 multi-domain PLA activity: air sorties, naval presence, and CCG incursions. The green band marks the May 14-15 Trump-Xi summit in Beijing; the gold band marks the early-March Two Sessions quiet period. Inverted triangles atop the air panel mark allied Taiwan Strait transits (United States, January 16; Australia, February 20; Japan, April 17; Canada, May 22).

Throughout the first five months of 2026, all three domains have shown a steady upward trend. Air activity was volatile and responsive to political events, dipping to a low in early March before rebounding through April and May to reach the year’s highest point. A key political signal was the pause in sorties during the Trump-Xi summit in mid-March, which was followed by a resumption of activity. Naval presence stayed stable, unaffected by fluctuations in air activity. Coast Guard incursions averaged around five per month, with May reestablishing the Dongsha pattern seen in April and adding a new east-of-Taiwan area at month’s end. Each domain should be analyzed in context. The early-year decline in sortie numbers did not indicate de-escalation, and May’s rebound alone does not suggest escalation. The overall multi-domain posture continues to reflect the sustained PLA activity around Taiwan since August 2022. In May, the PLA maintained this posture at the high end of its 2026 range, despite shifting signals from Washington.

Figure 6. May air activity year-over-year: total sorties and ADIZ entries, 2024–2026.

Methodology & Sources

Air and naval detection data are drawn from daily press releases issued by Taiwan’s Ministry of National Defense and compiled in the PLA Activity Center database maintained by the Taiwan Security Monitor. Coast Guard incident data are compiled from Coast Guard Administration press releases and verified against contemporaneous media reporting in the China Coast Guard Incident Tracker Database. Allied Taiwan Strait transit records are drawn from the Taiwan Strait Transit Tracker maintained by the Taiwan Security Monitor. Contextual and allied developments draw on Taiwan Security Monitor reporting through late May and early June 2026. “ADIZ” denotes Taiwan’s Air Defense Identification Zone; “median line” refers to the informal centerline of the Taiwan Strait historically observed by both sides. “JCRP” denotes Joint Combat Readiness Patrols as designated by Taiwan’s MND. All analysis and commentary are by the Taiwan Security Monitor.

© 2026 Taiwan Security Monitor. All rights reserved.

PLA Activity Monthly Update, May 2026

Author: Ethan Connell

Notes:

  • All data from Taiwan’s MND / TSM’s PLA Activity Center
  • Percentage increases/decreases represent change from April to May.
  • Detection frequency refers to the number of times an airframe type is mentioned in updates, not the total number of aircraft sorties per airframe type.
  • “Official vessels” refers to China Coast Guard vessels and official PRC research ships.

More information available at the PLA Activity Tracker.

PLA Activity Update, 5/31/2026

Author: Ethan Connell

Notes:

  • All data from Taiwan’s MND
  • Percentage increases/decreases represent change from week to week.
  • Detection frequency refers to the number of times an airframe type is mentioned in updates, not the total number of aircraft sorties per airframe type.
  • “Official vessels” refers to China Coast Guard vessels and official PRC research ships.

More information at the PLA Activity Tracker.

Strait Snapshot, April 2026 Update

Authors: Ethan Connell & Jonathan Walberg

KEY FINDINGS

  • Taiwan’s Ministry of National Defense recorded 229 PLA aerial sorties around the island in April 2026, of which 169 entered Taiwan’s southwestern Air Defense Identification Zone. The total represents a 58 percent year-on-year decline from April 2025’s 546 sorties, but a 56-sortie increase from March, interrupting the consecutive monthly declines observed across the first quarter.
  • Two joint combat readiness patrols framed the month, on April 1 (25 aircraft) and April 25 (28 aircraft), and the PLA’s Liaoning aircraft carrier transited the Taiwan Strait on April 20. The contraction in routine sortie volume since January has not extended to either surge capacity or strategic signaling.
  • PLAN vessel detections averaged 7.1 per day in April, peaking at 11. These figures remain within the five-to-nine vessel baseline observed throughout 2025, reaffirming the structural decoupling between air sortie volume and naval presence.
  • The Taiwanese Coast Guard Administration recorded three incursions by CCG vessels into Taiwan’s restricted waters in April, all around Kinmen. April is the first month of 2026 without a Dongsha (Pratas) incursion, breaking a monthly cadence sustained from January through March. Cumulative incursions across the first four months of the year total 18, with 15 around Kinmen and three around Dongsha.

Above the Floor

April 2026 marked a partial reversal of a three-month decline that had defined the first quarter. The month’s 229 detected sorties, including 169 that crossed the Taiwan Strait median line or entered the southwestern Air Defense Identification Zone, exceeded March’s 173-sortie total by 56 but remained 58 percent below the 546 sorties recorded in April 2025. The sequential trajectory across the first four months of 2026 (270 → 190 → 173 → 229)  places March’s lull as a floor rather than the continuation of a sustained downward trend, with overall activity holding well below the 2025 baseline.

The month opened and closed with joint combat readiness patrols: the April 1 JCRP involved 25 aircraft, continuing the late-March return to operations after the Two Sessions lull, while the April 25 JCRP involved 28 aircraft and coincided with the final day of Taiwan’s annual Han Kuang 42 computer-simulated wargames. Between these two patrols, daily activity remained subdued, with two zero-detection days (April 4 and April 12) and a string of single-digit days through the mid-month. The final third of April produced elevated single-day totals, with 24 aircraft on April 20, 22 aircraft on April 27, and 17 aircraft on April 10.

Figure 1. Daily PLA aerial activity around Taiwan, April 2026. Gold stars mark JCRP days; the April 20 surge corresponds with the Liaoning carrier transit.

The April 20 spike coincided with the transit of the Liaoning aircraft carrier and escorts (CV-16) through the Taiwan Strait. The PLA’s Eastern Theater Command described the movement as part of long-range combat training in the western Pacific, and Taiwan’s MND released images of the carrier’s air wing during the transit. Japan’s JS Ikazuchi (DD-107) had transited the Strait three days earlier, on April 17 (the anniversary of the Treaty of Shimonoseki) drawing Beijing’s condemnation as a deliberate provocation. Together with the two JCRPs, these events indicate that the contraction in routine sortie volume since January has not extended to surge capacity or strategic signaling.

Monthly Trajectory: A Floor, Not a Trend

Viewed against the preceding three months, April’s 229-sortie total interrupts the consecutive decline that ran from January through March. Monthly totals across the first four months of 2026 (270, 190, 173, and 229) show a curve that fell sharply through Q1 before stabilizing.

Figure 2. Monthly PLA aerial activity sortie totals, 2024–2026. April 2026 marks a modest rebound from March’s three-month low.

JCRP cadence offers a more stable read on PLA intent than aggregate sortie counts. April’s two JCRPs match February’s two and fall one short of March’s three. The April 25 peak of 28 aircraft is comparable to the 36-aircraft peak observed on March 17 and consistent with the cadence of roughly one large-format exercise per month sustained since August 2022. Reductions in routine sortie volume have not yet been accompanied by a comparable decline in the PLA’s willingness to mount high-intensity demonstrations on short notice.

At Sea: Carrier Transit and a Steady Baseline

PLAN vessel detections averaged 7.1 per day in April, peaking at 11 vessels on April 19 and again on April 28. These figures fall within the five-to-nine vessel range that has characterized PLAN presence throughout 2025 and the first four months of 2026. The Liaoning transit on April 20 registers in qualitative rather than quantitative terms: a single-day strategic signaling operation that did not move the monthly aggregate. Eastern Theater Command’s framing of the transit as long-range combat training in the western Pacific points to posture rather than escalation.

Figure 3. PLAN vessel and official ship detections around Taiwan, April 2026.

Naval presence held at baseline levels through April, reinforcing a structural observation that has held throughout 2026: air sorties appear responsive to political calendars and institutional dynamics, whereas naval presence functions as a persistent baseline feature of cross-strait military activity. The April carrier transit shows that this baseline coexists with episodic surge operations of strategic weight rather than displacing them.

Coast Guard Gray Zone Operations

China Coast Guard (CCG) activity in Taiwan’s restricted waters continued through April but contracted geographically. The CCG conducted 3 documented incursions on April 21, April 24, and April 28, all of them around Kinmen. Each incursion involved the same four-cutter rotation (hull numbers 14530, 14531, 14604, and 14609) and concluded within roughly two hours of entering restricted waters, consistent with the institutionalized two-to-three-hour Kinmen pattern documented in earlier months. Cumulative CCG incursions across the first four months of 2026 now total 18, with 15 around Kinmen and 3 around Dongsha.

Figure 4. CCG incursions into Taiwan’s restricted waters, January–April 2026, by location and vessel count.

The April pause around Dongsha is perhaps the most analytically distinctive feature of the month’s CCG activity. January, February, and March each included a single Dongsha (Pratas) operation, several with dwell times exceeding twenty-four hours; April’s gap breaks that monthly cadence for the first time in 2026. The narrower reading is that the once-monthly Dongsha rhythm reflected an operational pattern rather than a binding institutional commitment, and that May or June observations will either restore it or confirm its discontinuation. A broader reading is that the CCG temporarily consolidated around the proximate Kinmen rotation while the PLA Navy carried the month’s strategic signaling through the Liaoning transit. The Coast Guard Administration’s announcement earlier in April of US$1.88 billion in Pratas-area infrastructure and patrol upgrades indicates continuing Taiwanese concern about the durability of presence at its most remote outlying holding.

The Full Picture: Multi-Domain Overview

Figure 5. January–April 2026 multi-domain PLA activity: air sorties, naval presence, and CCG incursions.

Viewed across all three domains, the first four months of 2026 reinforce an analytical pattern visible since January. Air activity has been volatile and politically responsive, with a pronounced lull in early March and a partial rebound in April. Naval presence has been held within the established baseline throughout, including during the week of the Liaoning carrier transit. Coast Guard incursions have continued at roughly five incidents per month, with the April pattern narrowing geographically and interrupting the once-monthly Dongsha cadence. Analysts and policymakers would be well served by resisting the temptation to interpret a reduction in the headline sortie count as evidence of overall de-escalation. The multi-domain posture, taken as a whole, does not indicate a meaningful departure from the sustained pattern of PLA activity around Taiwan that has defined cross-strait military dynamics since August 2022.

Figure 6. April air activity year-over-year: total sorties and median line crossings, 2024–2026.

Methodology & Sources

Air and naval detection data are drawn from daily press releases issued by Taiwan’s Ministry of National Defense and compiled in the PLA Activity Center database maintained by the Taiwan Security Monitor. Coast Guard incident data are compiled from Coast Guard Administration press releases and verified against contemporaneous media reporting in the China Coast Guard Incident Tracker Database. Allied and contextual events draw on Taiwan Security Monitor’s Weekly Security Reviews of April 6, April 16, April 20, and April 27. “Median line” refers to the informal centerline of the Taiwan Strait historically observed by both sides. “JCRP” denotes Joint Combat Readiness Patrols as designated by Taiwan’s MND. All analysis and commentary are by the Taiwan Security Monitor.

© 2026 Taiwan Security Monitor. All rights reserved.

Taiwan’s Mine Warfare Gap: The Distance Between Concept and Capability

Author: Ethan Connell

Naval mines represent one of the few weapon systems capable of imposing disproportionate costs on an amphibious assault force. In a potential Taiwan contingency, mines could delay People’s Liberation Army (PLA) shipping, channel invasion routes into designated kill zones, deny port access, and compel an attacker to allocate valuable time to mine clearance before initiating troop landings. Given that Taiwan’s survival in a cross-Strait conflict relies on gaining time for mobilization and potential external intervention, mines should occupy a central role in defense planning.

The effectiveness of Taiwan’s mine warfare (MIW) and mine countermeasures (MCM) posture depends on several factors: the number of platforms, delivery methods, survivability in combat, mine quality, and the operational geography and threat environment. When evaluated against these criteria, Taiwan presents a mixed picture. While significant investments in offensive minelaying have occurred since 2020, the MCM fleet remains outdated and insufficient for modern threats; minelayers are slow and lightly armed, and there is no confirmed air-delivered mine capability. The gap between doctrinal ambition and practical wartime capability remains substantial. Rather than exhibiting asymmetric innovation, Taiwan’s MIW and MCM posture illustrates the challenges of translating strategic concepts into a survivable, operational force structure.

The Operational Logic of Mining the Strait

Any PLA amphibious assault would require moving large numbers of troops, vehicles, and supplies across 130 to 220 kilometers of open water. That crossing force must load at embarkation ports, transit the strait, and arrive at a limited set of suitable landing areas on Taiwan’s western coastline. Mines can impose costs at each stage.

Taiwan can mine its own coastal waters, port approaches, and landing beaches to slow or funnel an invasion fleet. Mines laid in the strait or near PLA embarkation points could delay loading operations and force PLA commanders to commit mine countermeasures assets before the crossing begins. The Taiwan Strait’s bathymetry favors mining, with average depths of about 60 meters, the Taiwan Banks (averaging 20 meters) at the southern entrance, and the Changyun Ridge extending westward from Taiwan at around 30 meters depth. These conditions make the strait especially suitable for bottom and moored mines while compressing commercial and military traffic into predictable routes. The entire strait sits on Asia’s continental shelf, within the operational envelope of all modern mine types.[1]

Three categories of capability matter here: Offensive mining targets the adversary’s waters and transit routes. Defensive mining protects one’s own ports, littorals, and landing areas. Mine countermeasures, including the detection, classification, and neutralization of enemy mines, protect one’s own freedom of movement. Taiwan needs all three, and faces different constraints in each.

Effectiveness in each category relies not only on hardware but also on the supporting operational infrastructure. This includes pre-delegation of authority to conduct mining before hostilities commence, dispersed stockpiles at multiple embarkation points, rehearsed loading and deployment procedures, integration with broader coastal defense plans, and hydrographic preparation of minefields. While it is difficult to determine from open sources whether Taiwan has established this architecture, this uncertainty significantly influences assessments of the subsequent force structure.

Taiwan’s Minelaying Capability

Taiwan’s most notable recent investment is the Min Jiang-class fast minelayer, built by Lung Teh Shipbuilding in Yilan County. These 347-ton vessels are the Republic of China Navy’s (ROCN) first purpose-built minelaying platforms. The ROCN commissioned four hulls in January 2022, assigning them to the 192nd Fleet’s Mine Laying Unit at Zuoying Naval Base in Kaohsiung.[2] In March 2025, Taiwan’s Ministry of National Defense (MND) opened a third tender for six additional vessels, budgeted at NT$1.8 billion (US$54.8 million), after two prior tenders failed to attract the minimum number of bids required under procurement law.[3] If that procurement project succeeds, Taiwan will operate 10 dedicated minelayers by around 2027.

Each Min Jiang-class vessel can carry up to 64 Mk-6 mines, 64 Wan Xiang I conical mines, 36 Wan Xiang I cylindrical mines, 40 Wan Xiang II moored mines, or 32 Wan Xiang II bottom mines.[4] The vessels use an automated mine-laying system developed by the National Chung-Shan Institute of Science and Technology (NCSIST), a significant improvement over the manual methods used on the converted landing craft that served as Taiwan’s improvised minelayers before 2022.

The mine inventory spans two families. The Wan Xiang family, developed by NCSIST, includes influence, moored, and bottom variants. NCSIST has also pursued development of self-propelled mines and new shallow- and deep-water influence types, though open-source confirmation of their operational status is limited.[5] Alongside these indigenous systems, Taiwan maintains stockpiles of the U.S.-designed Mk-6 moored contact mine, a design dating to 1917. The ROCN used Mk-6 mines in training exercises as late as 2024.[6]

Reliable estimates of Taiwan’s total mine stockpile are unavailable in open sources. This issue is significant: even with 10 minelayers, each capable of carrying 32 to 64 mines per sortie, the total number of mines that could be deployed in the initial hours of a conflict depends on the depth of the stockpile, distribution across multiple loading points, and the number of sorties each vessel can complete before suffering losses. 10 minelayers, each conducting two sorties, could deploy between 640 and 1,280 mines, which is notable but not decisive given the strait’s width and the number of potential approaches. Whether Taiwan’s inventory can sustain mining operations beyond the initial wave remains uncertain and carries important operational implications.

Available open-source reporting indicates that Taiwan does not possess a confirmed air-delivered mine capability. Reports from approximately 2018 noted Taipei’s interest in acquiring U.S. Quickstrike mines, which can be deployed by aircraft at range and glide to their targets; however, this acquisition did not occur.[7] Air-delivered mines offer faster and longer-range deployment compared to ship-based methods and eliminate the need for slow surface platforms to enter contested waters. The absence of this capability constitutes a significant operational gap.

Taiwan’s Mine Countermeasures Fleet

Taiwan’s mine countermeasures posture tells a different story than its investment in minelaying. The ROCN’s MCM fleet consists of four Yung Feng-class minehunters built in Germany by Abeking and Rasmussen in 1991, two Yung Jin-class minehunters (ex-U.S. Navy Osprey-class), and a single remaining Yung Yang-class minesweeper, a former U.S. Navy Aggressive-class vessel whose design dates to the 1950s.[8]

PlatformTypeNumberStatus / Notes
Min Jiang-classFast minelayer4 (+ 6 planned)347 tons; commissioned 2022; 14 kt max; 32–64 mines per sortie
Yung Feng-classMinehunter4German-built (Abeking & Rasmussen), 1991; aging sonar and mechanical sweeping
Yung Jin-classMinehunter2Ex-USN Osprey-class; fiberglass hull; limited against modern mine threats
Yung Yang-classMinesweeper1Ex-USN Aggressive-class; 1950s-era design; wooden hull

These platforms are capable of conducting limited coastal mine clearance under permissive conditions. However, none are equipped to address the full spectrum of modern mine threats, such as rocket-rising mines, smart mines with anti-sweep features, or mines with target discrimination algorithms, all of which the PLA is assessed to possess or be developing.[9]

A failed modernization program compounds the problem. In 2014, the MND awarded a NT$35 billion (about US$1.2 billion) contract to a consortium of Ching Fu Shipbuilding, Lockheed Martin, and Italy’s Intermarine to build six new MCM vessels. In 2017, prosecutors raided Ching Fu’s offices. The company’s chairman was charged with forgery and loan fraud. The contract collapsed.[10] No replacement program has been announced. Taiwan’s MCM fleet has been frozen in time for over a decade, with no confirmed path to modernization.

Operational Constraints and Wartime Viability

Despite Taiwan’s investments, operational constraints significantly limit the potential effectiveness of its mine warfare forces in combat. These constraints differ between minelaying and mine clearance, but both are fundamentally shaped by the disparity between theoretical platform capabilities and their survivability under PLA attack.

The Min Jiang-class maxes out at 14 knots. That speed cannot outrun any modern combatant, anti-ship missile, or armed helicopter. For self-defense, the vessels carry a single T-75 20mm autocannon and two 7.62mm machine guns, with negligible protection against PLA anti-ship cruise missiles. A Beaufort 3 sea-state limitation on the class restricts operations to calm weather, meaning rougher conditions could prevent the vessels from laying mines when needed most or confine them to predictable windows that the PLA could monitor and target. Minelaying also demands that ships follow predetermined tracks at consistent, low speeds, turning them into predictable targets.[11]

PLA intelligence, surveillance, and reconnaissance (ISR) capabilities compound these problems. China’s ISR satellite constellation exceeded 359 systems as of early 2024, triple that of 2018, covering electro-optical, synthetic aperture radar, and signals intelligence. PLA aircraft conducted over 3,600 flights into Taiwan’s air defense identification zone in 2024.[12] Under these conditions, minelayers departing Zuoying would face a high probability of detection and tracking, particularly in the pre-conflict period when PLA surveillance is already at elevated levels. Whether continuous tracking would persist amid the fog and friction of active combat is less certain, but the vulnerability in peacetime and the crisis phase is clear.

This presents a timing problem with no clear answer. Mines work best when laid before hostilities begin or in the first hours of a conflict.[13] Pre-war mining of international waters, however, would be politically provocative and could accelerate escalation. Waiting until conflict starts risks PLA missile strikes suppressing minelayers before they finish their runs. Taiwan’s Overall Defense Concept envisions minelaying during a crisis or mobilization phase, but whether Taiwanese political leadership would authorize mining before the first shots are fired, and whether the operational architecture for rapid, pre-delegated deployment exists, remain open questions.[14]

Mine warfare effectiveness in this context is influenced by more than the number of dedicated platforms. Factors such as air superiority over the strait, missile suppression of embarkation areas, hydrographic knowledge of planned minefields, availability of pre-surveyed mine positions, and external assistance from partners all affect the number of mines deployed and their operational impact. Taiwan’s minelaying capacity should be assessed as part of an integrated coastal defense architecture, recognizing that other components of this system also face significant constraints.

On the minelaying side, even a small number of mines laid in the strait or near PLA embarkation points could impose real costs: PLA commanders would have to commit MCM assets, delaying the crossing timeline and introducing uncertainty into an operation that demands precise coordination. The psychological burden of mines is well-documented: the suspicion of a minefield, even an unconfirmed one, can halt or reroute naval operations for days.

However, Taiwan’s capacity to realize this potential under combat conditions is limited. With four operational minelayers (potentially 10 by 2027), each with a maximum speed of 14 knots and minimal self-defense capabilities, and operating under intense surveillance in the Western Pacific, the likelihood of successfully conducting large-scale mining operations after hostilities commence is low. The absence of air-delivered mines further deprives Taiwan of the most survivable and responsive means of delivery.

The imbalance is even more pronounced regarding mine countermeasures. Mine clearance is inherently slow, hazardous, and resource-intensive. Taiwan’s current MCM fleet is insufficient for the scale of the threat. Should the PLA mine Kaohsiung, which manages over 60 percent of Taiwan’s cargo trade, the island’s capacity to sustain itself during a blockade or invasion would rely on mine clearance capabilities that are presently inadequate to meet the challenge.[15]

The MCM problem runs in the opposite direction from minelaying. The PLA holds an estimated 50,000 to 100,000 naval mines and can deliver them by submarine, aircraft, surface ship, or, conceivably, civilian vessel.[16] If the PLA mines Taiwan’s port approaches before or during an assault, Taiwan’s aging MCM fleet would be overwhelmed. The PLA can seed Taiwan’s ports with mines far faster than Taiwan can clear them.

The PLA’s Own Mine Clearance Problem

The discussion so far has treated the PLA primarily as a mine-laying actor and an ISR threat. But an amphibious crossing of the Taiwan Strait would also require the PLA to clear mines from its own approach routes: either mines laid defensively by the ROCN in coastal waters and around landing beaches, or mines laid by the PLAN itself to deny port access or deter outside involvement. This is not a trivial requirement to overcome.

The PLA Navy (PLAN) operates a fleet of Type 082 (Wozang-class) and Type 081 (T-43-class) minesweepers, supplemented by newer Type 082-II MCM vessels. Open-source assessments suggest the PLAN has roughly 24–36 dedicated MCM platforms, a modest number relative to the scale of an amphibious operation across a strait that could be mined at multiple points.[17][18] The PLAN has invested in unmanned mine-clearance systems and towed sweeping gear, but whether these assets could clear defended minefields under fire, while Taiwan’s anti-ship missiles, shore-based artillery, and surviving naval units remain in play, is far from certain.

This reciprocal vulnerability is analytically significant. While Taiwan’s mine warfare gap is genuine, the PLA also faces substantial MCM constraints. If Taiwan succeeds in deploying even a moderate number of mines in critical locations before or during the initial phase of conflict, the PLA’s limited MCM capacity could create a bottleneck in the amphibious operation timeline. Thus, the mine warfare balance reflects not only Taiwan’s limitations but also the mutual clearance challenges faced by both sides.

Mine Warfare in the Broader Force Design Debate

Taiwan’s mine warfare posture aligns with the broader argument for asymmetric defense. The ODC, formulated by former Chief of the General Staff Admiral Lee Hsi-min, places mines among the key littoral and beach defense capabilities alongside anti-ship cruise missiles and mobile coastal defense systems.[19] President Lai Ching-te personally inspected a live mine-laying drill during the Han Kuang 41 exercise in July 2025, signaling political commitment.[20]

However, political commitment does not necessarily translate into operational capability. Several critical questions remain unresolved in open-source analysis. Is the mine inventory sufficient in both quantity and sophistication to impose a meaningful delay on a PLA crossing force, or does it serve primarily as a symbolic deterrent? Has Taiwan developed the necessary doctrine, training, and operational infrastructure to employ mines effectively under wartime conditions, including pre-delegation of authority, pre-positioned stocks at dispersed locations, protected embarkation points, and rehearsed rapid-deployment procedures? Furthermore, does the MCM gap represent a strategic vulnerability that cannot be mitigated solely through increased investment in minelaying?

Regarding the final point, available open-source evidence strongly supports this concern. If Taiwan is unable to keep its own ports operational, the denial strategy becomes untenable. A navy capable of mining adversary approaches but unable to clear mines from its own harbors faces a significant strategic asymmetry. While this conclusion is not definitive (classified programs or undisclosed procurement efforts may exist), the publicly observable MCM posture does not inspire confidence.

Taiwan has made modest investments in minelaying capabilities while permitting its mine clearance capacity to decline. Although offensive mining is more cost-effective within a denial strategy and thus defensible in theory, this approach leaves Taiwan vulnerable to a PLA mining campaign with limited options for remediation.

The failed Ching Fu procurement remains a significant setback. The collapse of a billion-dollar program due to fraud, with no replacement in the subsequent nine years, exemplifies the institutional obstacles that can prevent well-designed defense strategies from being implemented.[21]

Implications

Taiwan’s mine warfare posture offers three findings for analysts and policymakers.

First, Taiwan’s leaders have grasped the value of asymmetric, cost-imposing tools and have acted on that understanding in the minelaying domain. The Min Jiang-class program, the Wan Xiang mine family, and the planned expansion to ten vessels represent a deliberate effort to build a capability that did not exist a decade ago. This is a modest but real achievement.

Second, developing a capability that is both survivable and operationally executable is considerably more challenging than simply recognizing its strategic value. Taiwan’s minelayers are slow and lightly armed, operating in an environment characterized by pervasive PLA ISR. The absence of air-delivered mines persists. The issue of when political leaders would authorize mining operations remains unresolved and has not been publicly addressed. Mine warfare effectiveness is determined by multiple factors beyond platforms, including air superiority, pre-positioned stockpiles, hydrographic preparation, and doctrinal readiness, all of which influence whether the capability can be employed effectively at the outset of a conflict.

Third, the gap in mine countermeasures is the most revealing indicator of Taiwan’s procurement challenges. For the United States and other partners, this suggests the need for targeted actions such as capability transfers, technology sharing, and joint planning in the mine warfare domain, which may be as important as platform sales. Unmanned MCM systems, an area where Taiwan’s domestic defense industry has not succeeded, represent a clear opportunity for collaboration. The stalled Quickstrike transfer warrants renewed focus, and joint exercises should rigorously test mine warfare scenarios.

For analysts evaluating Taiwan’s defense preparedness, the mine warfare gap serves as a clear test case. The credibility of any strategy depends on the existence of a deployable force structure to support it. In Taiwan’s situation, the persistent gap between strategic concepts and actual capabilities, between the vision of the Overall Defense Concept and the fleet available to implement it, remains the central challenge.

[1]Taiwan Strait geographic parameters—width, depth, and bathymetric features—are drawn from “Taiwan Strait,” Encyclopedia Britannica, and U.S. National Geospatial-Intelligence Agency, Sailing Directions (Enroute), Publication 157.

https://www.britannica.com/place/Taiwan-Strait

https://msi.nga.mil/Publications/SDEnroute

[2] Taiwan’s Ministry of National Defense commissioned the first four Min Jiang-class minelayers on January 14, 2022, assigning them to the 192nd Fleet’s Mine Laying Unit at Zuoying Naval Base. See Mike Yeo, “Taiwan Adds Minelaying to Defenses Against China,” Defense News, January 14, 2022.                                       

https://www.defensenews.com/naval/2022/01/14/taiwan-adds-minelaying-to-defenses-against-china

[3] The March 2025 tender for six additional Min Jiang-class vessels, budgeted at NT$1.8 billion, was the third attempt after two prior tenders failed to attract sufficient bids. See “Taiwan Seeks Contractor for Six Minelayers,” The Defense Post, March 6, 2025.

https://thedefensepost.com/2025/03/06/taiwan-contractor-six-minelayers

[4] Min Jiang-class specifications, including displacement, speed, mine capacity, and armament, are drawn from publicly available technical data. See “Taiwan Seeks Contractor for Six Minelayers,” The Defense Post, March 6, 2025; and Republic of China Ministry of National Defense, ROC National Defense Report, 2023.

https://www.ustaiwandefense.com/taiwan-ministry-of-national-defense-mnd-reports/

[5] Taiwan’s Wan Xiang mine family was developed by the National Chung-Shan Institute of Science and Technology (NCSIST). Open-source reporting on self-propelled mine development appears in the 2023 ROC National Defense Report. Confirmation of operational deployment of advanced variants remains limited.

https://www.ustaiwandefense.com/taiwan-ministry-of-national-defense-mnd-reports/

[6] Taiwan continues to train with the Mk-6 Mod 14 moored contact mine, a design dating to 1917. See Tyler Rogoway, “Taiwan Trains to Use Naval Mines Designed Over a Century Ago Against China,” The War Zone, 2024.

https://www.twz.com/taiwan-trains-to-use-naval-mines-designed-a-century-ago-against-china

[7] Reports of Taiwan’s interest in U.S. Quickstrike air-delivered mines circa 2018, and the failure of that acquisition, appear in Blake Herzinger, “Delay, Disrupt, Degrade: Mine Warfare in Taiwan’s Porcupine Defense,” War on the Rocks.

https://warontherocks.com/delay-disrupt-degrade-mine-warfare-in-taiwans-porcupine-defense

[8] Taiwan’s MCM fleet composition—four Yung Feng-class (German-built, 1991), two Yung Jin-class (ex-USN Osprey-class), and one remaining Yung Yang-class (ex-USN Aggressive-class)—is documented in International Institute for Strategic Studies, The Military Balance 2025 (London: IISS, 2025); and Jane’s Fighting Ships 2024–2025.

https://www.iiss.org/publications/the-military-balance/2025/the-military-balance-2025

[9] PLA mine types, including the EM-52 rocket-rising mine, EM-53 bottom influence mine, and EM-55 mobile mine, are cataloged in Office of Naval Intelligence, The PLA Navy: New Capabilities and Missions for the 21st Century (2015); and in the Naval War College’s China Maritime Studies Institute publications. PLA MCM platforms are assessed in The Military Balance 2025 by IISS.

https://news.usni.org/2015/04/09/document-office-of-naval-intelligence-2015-assessment-of-chinese-peoples-liberation-army-navy

https://nuke.fas.org/guide/china/plan-2015.pdf

[10] The Ching Fu Shipbuilding scandal, involving an NT$35 billion MCM contract awarded in 2014 that collapsed by 2017 amid fraud charges, is documented in “Taiwan to Build Six New MCM Ships with U.S., Italian Help,” USNI News, November 3, 2014; and subsequent Taipei Times reporting, 2017.

https://news.usni.org/2014/11/03/taiwan-build-six-new-mcm-ships-u-s-italian-help-china-displeased

https://globaltaiwan.org/2017/11/crux-of-ching-fus-case-concerns-china/

https://www.taipeitimes.com/News/taiwan/archives/2019/09/29/200372310

[11] Min Jiang-class specifications, including displacement, speed, mine capacity, and armament, are drawn from publicly available technical data. See “Taiwan Seeks Contractor for Six Minelayers,” The Defense Post, March 6, 2025; and Republic of China Ministry of National Defense, ROC National Defense Report, 2023.

https://www.ustaiwandefense.com/taiwan-ministry-of-national-defense-mnd-reports/

[12] China’s ISR satellite constellation exceeded 359 systems as of January 2024. PLA aircraft conducted 3,615 flights into Taiwan’s ADIZ in 2024. See “All Quiet in the Taiwan Strait? Explaining the Recent Drop in PLA Aircraft Activity Around Taiwan,” Taiwan Security Monitor, and U.S.-China Economic and Security Review Commission, 2024 Annual Report to Congress.https://tsm.schar.gmu.edu/all-quiet-in-the-taiwan-strait-explaining-the-recent-drop-in-pla-aircraft-activity-around-taiwan

https://www.uscc.gov/annual-report/2024-annual-report-congress

https://www.uscc.gov/sites/default/files/2024-03/J.Michael_Dahm_Testimony.pdf

[13] Joint Chiefs of Staff, Joint Publication 3-15: Barriers, Obstacles, and Mine Warfare for Joint Operations (Washington, DC: Joint Chiefs of Staff, September 6, 2016; validated March 5, 2018), https://www.bits.de/NRANEU/others/jp-doctrine/jp3_15pa%282018%29.pdf

[14] The Overall Defense Concept (ODC), formulated by former Chief of the General Staff Admiral Lee Hsi-min, envisions mines as a key capability for littoral defense. See Lee Hsi-min and Eric Lee, “Taiwan’s Overall Defense Concept, Explained,” The Diplomat, November 3, 2020.

https://thediplomat.com/2020/11/taiwans-overall-defense-concept-explained

[15] Kaohsiung handles over 60 percent of Taiwan’s cargo throughput. About 44 percent of the world’s container fleet transits the Taiwan Strait each year. See Bureau of Transportation and Communications, Taiwan Statistical Yearbook 2024; and Bloomberg, “Taiwan Strait Shipping Traffic Analysis,” 2024.

https://www.usni.org/magazines/proceedings/2023/november/taiwan-strait-oceans-most-contested-place https://www.statista.com/statistics/1045142/container-throughput-volume-in-kaohsiung-port-taiwan/

[16] China’s naval mine inventory is estimated at 50,000 to 100,000 mines comprising over 30 varieties. See Andrew S. Erickson, Lyle J. Goldstein, and William S. Murray, Chinese Mine Warfare: A PLA Navy “Assassin’s Mace” Capability, China Maritime Studies Institute, U.S. Naval War College, 2009. The estimate has been widely cited in subsequent assessments, including the U.S. Department of Defense, Military and Security Developments Involving the People’s Republic of China, annual reports.

https://digital-commons.usnwc.edu/cmsi-red-books/7

[17] China’s naval mine inventory is estimated at 50,000 to 100,000 mines comprising over 30 varieties. See Andrew S. Erickson, Lyle J. Goldstein, and William S. Murray, Chinese Mine Warfare: A PLA Navy “Assassin’s Mace” Capability, China Maritime Studies Institute, U.S. Naval War College, 2009. The estimate has been widely cited in subsequent assessments, including the U.S. Department of Defense, Military and Security Developments Involving the People’s Republic of China, annual reports.

https://digital-commons.usnwc.edu/cmsi-red-books/7

[18] PLA mine types, including the EM-52 rocket-rising mine, EM-53 bottom influence mine, and EM-55 mobile mine, are cataloged in Office of Naval Intelligence, The PLA Navy: New Capabilities and Missions for the 21st Century (2015); and in the Naval War College’s China Maritime Studies Institute publications. PLA MCM platforms are assessed in The Military Balance 2025 by IISS.

https://news.usni.org/2015/04/09/document-office-of-naval-intelligence-2015-assessment-of-chinese-peoples-liberation-army-navy

https://nuke.fas.org/guide/china/plan-2015.pdf

[19] The Overall Defense Concept (ODC), formulated by former Chief of the General Staff Admiral Lee Hsi-min, envisions mines as a key capability for littoral defense. See Lee Hsi-min and Eric Lee, “Taiwan’s Overall Defense Concept, Explained,” The Diplomat, November 3, 2020.

https://thediplomat.com/2020/11/taiwans-overall-defense-concept-explained

[20] President Lai Ching-te inspected a live mine-laying drill during the Han Kuang 41 exercise in July 2025. See “Lai Inspects Mine Drill,” Focus Taiwan, July 14, 2025.

https://focustaiwan.tw/politics/202507140021

[21] The Ching Fu Shipbuilding scandal, involving an NT$35 billion MCM contract awarded in 2014 that collapsed by 2017 amid fraud charges, is documented in “Taiwan to Build Six New MCM Ships with U.S., Italian Help,” USNI News, November 3, 2014; and subsequent Taipei Times reporting, 2017.

https://news.usni.org/2014/11/03/taiwan-build-six-new-mcm-ships-u-s-italian-help-china-displeased

https://globaltaiwan.org/2017/11/crux-of-ching-fus-case-concerns-china/

https://www.taipeitimes.com/News/taiwan/archives/2019/09/29/200372310

Strait Snapshot, March 2026 Update

Author: Ethan Connell & Jonathan Walberg

Key Findings

  • In March 2026, Taiwan’s Ministry of National Defense recorded 173 PLA aerial sorties around the island, representing a 60 percent year-over-year decline and extending the downward trend observed since the December 2025 Justice Mission exercises.
  • Between late February and mid-March, air operations declined to near-zero levels for thirteen days. This lull coincided with China’s annual Two Sessions legislative period of the National People’s Congress and followed the dismissal of two senior Central Military Commission vice-chairmen in January. This pattern aligns with previously documented instances of institutional caution during politically sensitive periods.
  • Taiwanese Coast Guard Administration data shows 15 documented CCG incursions into Taiwan’s restricted waters from January through March, concentrated around Kinmen (12 incidents) and Dongsha Island (three incidents), with dwell times in the Dongsha incursions exceeding 24 hours.
  • In March, PLAN vessel detections around Taiwan averaged approximately seven per day, consistent with the five-to-nine vessel baseline observed throughout 2025. The continued naval presence during a period of reduced air activity suggests that the air and maritime domains are governed by distinct operational logics.

The March Lull

March 2026 marked a significant deviation from the People’s Liberation Army (PLA) air activity patterns observed around Taiwan during the previous twelve months. The 173 detected aircraft sorties, including 121 that entered Taiwan’s Air Defense Identification Zone, constitute a 60 percent reduction from March 2025, when 431 sorties were recorded. This figure also continues the sequential decline observed in the first three months of 2026: January recorded 270 sorties, February recorded 190, and March recorded 173.

A notable feature of the month was the lull in PLA air activity in early March, during which Taiwan detected only limited aircraft activity around the island. Rather than pointing to a single discrete cause, this slowdown is better understood as the product of overlapping factors. The strongest explanation remains the PRC’s domestic calendar: the annual “Two Sessions,” combined with the tail end of the Spring Festival period, has historically aligned with a lower operational tempo around Taiwan. Other theories, including the idea that leadership turmoil within the PLA or fuel pressures linked to Middle East instability drove the reduction, are harder to sustain. As TSM noted in The Monitor, those explanations fit the available evidence less well, especially given continued Chinese activity in the East and South China Seas during the same period.

Figure 1. Daily PLA activity around Taiwan, March 2026. The shaded region marks the quiet period.

Air operations resumed in the second half of March. On March 17, Taiwan’s Ministry of National Defense (MND) reported a joint combat readiness patrol (JCRP) involving thirty-six aircraft, marking the month’s single-day peak. This was followed by a second JCRP on March 28 with nineteen aircraft and a third on April 1. The resumption of large-scale exercises after a period of relative quiet aligns with patterns observed in previous years. The PLA appears to adjust its daily sortie rate in response to political calendars and internal dynamics while maintaining the capacity for periodic high-intensity demonstrations.

Monthly Trajectory: A Sustained Decline

March’s figures are a continuation of a three-month decline. From January through March 2026, monthly sortie totals fell from 270 to 190 to 173, respectively. This trajectory comes on the heels of the elevated activity of late 2025, when the PLA’s Justice Mission-2025 exercise on December 29 saw the use of 130 aircraft in a single day, the largest single-day operation around Taiwan since comprehensive daily reporting began.

Figure 2. Monthly PLA sortie totals, 2024–2026. The January–March 2026 trend shows consecutive declines.

However, the frequency of Joint Combat Readiness Patrols (JCRPs), which represent the highest-intensity format of PLA air operations around Taiwan, has remained broadly stable. March 2026 included three JCRPs, matching the number in March 2025 and exceeding the two recorded in March 2024. This continuity indicates that the reduction in routine sortie volume has not been accompanied by a corresponding decrease in the PLA’s willingness or ability to conduct large-scale, multi-domain demonstrations on short notice.

At Sea: Persistent Naval Presence

PLAN vessel detections in the waters around Taiwan averaged 7.2 per day in March, with a peak of eleven on a single day. These figures are consistent with the range of 5-9 vessels that have characterized PLAN presence throughout 2025. The stability of the naval posture during a month of minimal air activity highlights a structural difference in how the PLA manages its air and maritime components around Taiwan. Air sorties appear responsive to political calendars and institutional dynamics, whereas naval presence serves as a persistent baseline feature of cross-strait military activity.

Figure 3. PLAN vessel and official ship detections around Taiwan, March 2026.

This divergence between air and naval activity patterns holds analytical significance for assessments of cross-strait tension. Analysts who focus solely on sortie counts may interpret the March figures as evidence of de-escalation, however the unchanged naval footprint demonstrates that the PLA’s overall posture in the Taiwan Strait has not meaningfully decreased.

Coast Guard Gray Zone Operations

China Coast Guard (CCG) activity in Taiwan’s restricted waters represents a third, often underreported, dimension of cross-strait pressure. From January through March 2026, the CCG conducted at least 15 documented incursions: 12 around Kinmen and three near Dongsha Island (Pratas). The Kinmen operations have developed into a recognizable pattern, typically involving two to four CCG cutters entering restricted waters for two to three hours before withdrawing. This approach appears intended to establish a regular CCG presence in waters considered under the jurisdiction of Taiwan’s Coast Guard Administration.

Figure 4. CCG incursions into Taiwan’s restricted waters, January–March 2026, by location and vessel count.

The Kinmen incursions have involved a recurring set of CCG cutters (specifically, hull numbers 14529, 14603, 14605, and 14609), indicating a dedicated patrol rotation rather than ad hoc deployments. The Dongsha operations differ qualitatively, involving larger vessels from the 3101 and 3102 classes and featuring extended dwell times, with the March 18th incursion east of Dongsha lasting over twenty-five consecutive hours. The increasing dwell times at Dongsha merit particular attention, as they challenge the Coast Guard Administration’s capacity to maintain a sustained presence at Taiwan’s most remote holding.

The Full Picture: Multi-Domain Overview

Figure 5. January–March 2026 multi-domain PLA activity: air sorties, naval presence, and CCG incursions.

An examination of all three domains simultaneously reveals that the first three months of 2026 present a more complex situation than any single metric suggests. Air activity has been volatile and responsive to political events, while naval presence has remained steady and largely unaffected by fluctuations in the air domain. Coast Guard incursions have persisted and, in the Dongsha cases, have increased in duration. Analysts and policymakers should avoid interpreting a reduction in one domain as an overall reduction in pressure. The multi-domain posture, considered in its entirety, does not indicate meaningful de-escalation.

Figure 6. March air activity year-over-year: total sorties and median line crossings, 2024–2026.

Methodology & Sources

Air and naval detection data are drawn from daily press releases issued by Taiwan’s Ministry of National Defense and compiled in the PLA Activity Center database maintained by Taiwan Security Monitor. Coast Guard incident data are compiled from Coast Guard Administration press releases, verified against contemporaneous media reporting, and compiled in the China Coast Guard Incident Tracker Database. “Median line” refers to the informal centerline of the Taiwan Strait historically observed by both sides. “JCRP” denotes Joint Combat Readiness Patrols as designated by Taiwan’s MND. All analysis and commentary are by Taiwan Security Monitor.

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