| 1 | 1,625 d | Exercises | Hazardous operations continue in the Black Sea off Ukraine in an area bounded by 45-05N 033-33E, 45-59N 033-51E, 47-00N 031-43E, 46-19N 029-55E, 45-05N 029-17E until further notice. Black Sea · Ukraine · Black Sea | HYDROLANT 838/22 2022-03-23 |
| 2 | 527 d | Exercises | Hazardous operations continue in two areas in the Eastern Caribbean Sea off Venezuela until further notice. Eastern Caribbean Sea · Venezuela · Caribbean Sea | NAVAREA IV 354/25 2025-03-25 |
| 3 | 212 d | Exercises | Hazardous operations take place daily in the Aegean Sea until 14 June and from 16 September to 31 December, in a defined area. Aegean Sea · Aegean Sea | HYDROLANT 236/26 2026-02-03 |
| 4 | 212 d | Exercises | Hazardous operations occur daily 0500Z to 1500Z until 14 June and 16 September to 31 December, excluding Fridays, Saturdays, Sundays, and holidays, in Aegean Sea area. Aegean Sea · Aegean Sea | HYDROLANT 238/26 2026-02-03 |
| 5 | 70 d | Exercises | Hazardous operations are taking place in the western Mediterranean Sea off Spain from 29 to 30 October, until cancelled on 31 October. Western Mediterranean Sea · Spain · Mediterranean Sea - Western Basin | HYDROLANT 1235/26 2026-06-25 |
| 6 | 68 d | Exercises | Towed target shooting exercise in western Mediterranean Sea on October 29 or 30, 2026, within a defined area; canceled by October 31. Western Mediterranean Sea · Mediterranean Sea - Western Basin | NAVAREA III 100/26 2026-06-27 |
| 7 | 44 d | Exercises | Pakistan conducts hazardous operations in the Arabian Sea on August 3-7, 10-14, 17-21, 24-28, and 31, from 0300 to 1900Z daily. Arabian Sea · Pakistan · Arabian Sea | HYDROPAC 2169/26 2026-07-21 |
| 8 | 42 d | Exercises | Hazardous operations are occurring from August 1 to September 1 in the North Pacific off California. North Pacific · California · North Pacific Ocean | NAVAREA XII 511/26 2026-07-23 |
| 9 | 42 d | Exercises | Hazardous operations are underway off the coast of California from August 1 to September 1. North Pacific · California · North Pacific Ocean | NAVAREA XII 510/26 2026-07-23 |
| 10 | 42 d | Exercises | Hazardous operations are scheduled off the California coast in the North Pacific from August 1 to September 1. North Pacific · California · North Pacific Ocean | NAVAREA XII 512/26 2026-07-23 |
| 11 | 38 d | Exercises | Gunnery exercises occur daily from 2200Z to 1000Z on July 31, August 2-14, 16-21, 23-28, and 30 in the Sea of Japan near Russia. Sea of Japan · Russia · Japan Sea | HYDROPAC 2151/26 2026-07-27 |
| 12 | 38 d | Exercises | Gunnery exercises daily 2300-0900 Zulu, July 31 to August 30, North Pacific area bounded by 28-15N 146-30E, 25-25N 147-38E, 25-00N 145-36E, 27-55N 145-58E. North Pacific · North Pacific Ocean | HYDROPAC 2152/26 2026-07-27 |
| 13 | 36 d | Exercises | Hazardous operations are in progress in the South Atlantic until 060400Z June 27 near 24-39S 042-30W; two-mile berth requested. South Atlantic · South Atlantic Ocean | HYDROLANT 1457/26 2026-07-29 |
| 14 | 36 d | Exercises | Hazardous operations are occurring off Brazil in a bounded area from August 3 through September 11. South Atlantic · Brazil · South Atlantic Ocean | HYDROLANT 1462/26 2026-07-29 |
| 15 | 34 d | Exercises | Hazardous operations occur daily from 0001Z to 1600Z August 1-31 except Fridays and Saturdays in four areas of the Bay of Bengal, Bangladesh. Bay of Bengal · Bangladesh · Bay of Bengal | HYDROPAC 2187/26 2026-07-31 |
| 16 | 34 d | Exercises | Hazardous operations occur daily on 3,7,10,14,17,21,24,28,31 August in an area near 10N 76E, Eastern Indian Ocean. Eastern Indian Ocean · India · Laccadive Sea | HYDROPAC 2190/26 2026-07-31 |
| 17 | 17 d | Exercises | Live weapons firings occur daily from 0700 to 1700 UTC, 18-21 August, within 17 miles of 57-24.9N 007-59.7W west of South Uist in the Hebrides. Hebrides · South Uist Westwards · North Atlantic Ocean | UKWZ 501/26 2026-08-17 |
| 18 | 13 d | Exercises | Hazardous operations are occurring off California in the North Pacific from September 1 to October 1 within a specified area. North Pacific · California · North Pacific Ocean | NAVAREA XII 585/26 2026-08-21 |
| 19 | 13 d | Exercises | Hazardous operations off California in an area bounded by 32-40N to 32-55N and 118-15W to 118-35W from September 1 to October 1. North Pacific · California · North Pacific Ocean | NAVAREA XII 584/26 2026-08-21 |
| 20 | 13 d | Exercises | Hazardous operations are underway off California from September 1 0800 UTC to October 1 0800 UTC in a defined area. North Pacific · California · North Pacific Ocean | NAVAREA XII 586/26 2026-08-21 |
| 21 | 10 d | Exercises | Gunnery exercise in northern South China Sea from 290000Z to 291300Z August, alternate 050000Z to 051300Z September. South China Sea, Northern Part · Gunnery · South China Sea | NAVAREA XI 388/26 2026-08-24 |
| 22 | 9 d | Exercises | Hazardous operations take place in three North Pacific areas from 0600 to 1515 UTC on 28 August, with alternate times on 29 August. North Pacific · North Pacific Ocean | NAVAREA XII 578/26 2026-08-24 |
| 23 | 9 d | Exercises | Hazardous operations occur on 26 August and 2, 9, 16, 23, 30 September from 0300Z to 1300Z in an area of the Arabian Sea off Pakistan. Arabian Sea · Pakistan · Arabian Sea | HYDROPAC 2429/26 2026-08-25 |
| 24 | 9 d | Exercises | Gunnery exercises are scheduled on August 29 from 0000 to 0200 UTC, with alternate times from 0700 to 0900 UTC, in the South China Sea. South China Sea · South China Sea | HYDROPAC 2433/26 2026-08-25 |
| 25 | 8 d | Exercises | Hazardous operations occur daily on September 1 and 2, from 0100Z to 0800Z, in an area near Guam. North Pacific · Guam · North Pacific Ocean | HYDROPAC 2452/26 2026-08-26 |
| 26 | 8 d | Exercises | Hazardous operations in Bay of Bengal, India, from August 26 18:31 UTC to August 28 18:29 UTC in a bounded area. Bay of Bengal · India · Bay of Bengal | HYDROPAC 2440/26 2026-08-26 |
| 27 | 7 d | Exercises | Naval hazardous operations daily 01 through 05 September, 1400 to 1359 UTC, in areas near Guam, cancelled at 061459 UTC September 26. North Pacific · Guam · North Pacific Ocean | HYDROPAC 2460/26 2026-08-27 |
| 28 | 7 d | Exercises | Hazardous operations occur daily from 2200Z to 1000Z, 30 August through 3 September, near Guam in the Philippine Sea. North Pacific · Philippine Sea · Guam · Philippine Sea | HYDROPAC 2447/26 2026-08-27 |
| 29 | 7 d | Exercises | Hazardous operations near Guam from 0100-0600 UTC on Aug 31 and Sep 1, and 2000-0800 UTC on Sep 2-3. North Pacific · Guam · Philippine Sea | HYDROPAC 2448/26 2026-08-27 |
| 30 | 7 d | Exercises | Hazardous operations occur daily through September 3, from 0100 to 1300 UTC, within three miles of two positions near Guam. North Pacific · Philippine Sea · Guam · Philippine Sea | HYDROPAC 2449/26 2026-08-27 |
| 31 | 7 d | Exercises | Hazardous operations occur daily from 0100Z to 0800Z September 1-3 in an area near the Northern Mariana Islands in the Philippine Sea. North Pacific · Philippine Sea · Northern Mariana Islands · Philippine Sea | HYDROPAC 2453/26 2026-08-27 |
| 32 | 7 d | Exercises | Gunnery exercise daily 2300Z to 0900Z from Aug 31 to Sep 29 in North Pacific, Nanpo Shoto. North Pacific, Nanpo Shoto · Gunnery · North Pacific Ocean | NAVAREA XI 392/26 2026-08-27 |
| 33 | 7 d | Exercises | Gunnery exercises occur daily from 2300Z to 0900Z, August 31 to September 29, in the North Pacific. North Pacific · North Pacific Ocean | HYDROPAC 2457/26 2026-08-27 |
| 34 | 7 d | Exercises | Hazardous operations are underway off California on August 31 from 13:00 to 21:00 Coordinated Universal Time in a bounded area. North Pacific · California · North Pacific Ocean | NAVAREA XII 588/26 2026-08-27 |
| 35 | 6 d | Exercises | Hazardous operations are scheduled off California September 1 1800 UTC to September 2 0100 UTC, with alternate September 3 to 4, in a defined area. North Pacific · California · North Pacific Ocean | NAVAREA XII 589/26 2026-08-27 |
| 36 | 6 d | Exercises | Hazardous operations are in progress in the Arabian Sea, India, in two areas until 070800Z September, canceling HYDROPAC 2422/26. Arabian Sea · India · Arabian Sea | HYDROPAC 2461/26 2026-08-28 |
| 37 | 6 d | Exercises | Hazardous operations are in progress in the Arabian Sea until September 7, 08:00 UTC, within a defined area. Arabian Sea · Arabian Sea | HYDROPAC 2462/26 2026-08-28 |
| 38 | 6 d | Exercises | Hazardous operations are in progress until 070800Z September in Arabian Sea near India; cancel HYDROPAC 2420/26 and this message at 070900Z September. Arabian Sea · India · Arabian Sea | HYDROPAC 2463/26 2026-08-28 |
| 39 | 6 d | Exercises | Hazardous operations occur in the Bay of Bengal, India, from 05:00 UTC to 12:30 UTC on August 29, with cancellation at 13:30 UTC. Bay of Bengal · India · Bay of Bengal | HYDROPAC 2464/26 2026-08-28 |
| 40 | 6 d | Exercises | Hazardous operations in Bay of Bengal and eastern Indian Ocean, daily from 1230Z to 1530Z on 02 and 03 September, in a defined area. Bay of Bengal · Eastern Indian Ocean · India · Indian Ocean | HYDROPAC 2465/26 2026-08-28 |
| 41 | 6 d | Exercises | Andaman Sea, India: hazardous operations from 020830Z to 021030 in area bounded by 12-50N 093-40E, 12-50N 094-10E, 13-00N 094-10E, 13-00N 093-40E. Andaman Sea · India · Andaman or Burma Sea | HYDROPAC 2466/26 2026-08-28 |
| 42 | 6 d | Exercises | Hazardous operations daily 01-04 September in Eastern Indian Ocean, India, area bounded by 10-20N 075-00E, 10-20N 075-35E, 10-50N 075-35E, 10-50N 075-00E. Eastern Indian Ocean · India · Laccadive Sea | HYDROPAC 2467/26 2026-08-28 |
| 43 | 6 d | Exercises | Hazardous operations are in progress until 070800Z September in areas off India in the Arabian Sea and Eastern Indian Ocean. Arabian Sea · Eastern Indian Ocean · India · Arabian Sea | HYDROPAC 2468/26 2026-08-28 |
| 44 | 5 d | Exercises | Firing exercise in restricted area within 20 miles of Bravo 29-53N 010-15W between 270 and 360 degrees near Agadir and Tarfaya. Navigate with caution. Agadir, Tarfaya · North Atlantic Ocean | NAVAREA II 311/26 2026-08-29 |
| 45 | 0 d | Exercises | Hazardous operations are underway in the North Pacific Marianas area from 08 to 10 September, within a defined boundary, until 100900Z September. North Pacific, Marianas · Philippine Sea | NAVAREA XI 394/26 2026-09-03 |
| 46 | 0 d | Exercises | Firing exercise in Canarias within 20 miles of 26-50N 014-00W between 270 and 360 degrees; navigate with caution. Canarias · North Atlantic Ocean | NAVAREA II 315/26 2026-09-03 |