| 1 | 1,282 d | Other | Anchoring prohibited until further notice near Anguilla in an area bounded by 18-13.60N 063-04.15W, 18-13.60N 063-04.70W, 18-13.20N 063-04.70W, and 18-13.20N 063-04.50W; wide berth requested. Anguilla · Caribbean Sea | NAVAREA IV 222/23 2023-03-01 |
| 2 | 947 d | Other | At 21-06.00S 055-36.00E, MRCC La Réunion is unable to receive MF and HF transmissions; for assistance contact them at 2622 6243 4343 or [email protected]. Reunion · Indian Ocean | HYDROPAC 363/24 2024-01-30 |
| 3 | 884 d | Other | Ukraine declares coastal approach instructions for entry and departure in Ukrainian ports daily from 0200Z to 1700Z until further notice. Black Sea · Ukraine · Black Sea | HYDROLANT 682/24 2024-04-02 |
| 4 | 598 d | Other | In Kuwait, Persian Gulf, the meteorological tower at 28-46.0N 048-26.1E is temporarily replaced by a yellow buoy flashing 4 times every 15 seconds, 5 meters. Persian Gulf · Kuwait · Persian Gulf | HYDROPAC 83/25 2025-01-13 |
| 5 | 566 d | Other | Canada has activated Ice Control Zone Tango in the Labrador Sea, requiring laden oil tankers and chemical carriers to comply with Transport Canada's TP 15163. Labrador Sea | NAVAREA IV 190/25 2025-02-14 |
| 6 | 413 d | Other | The National Geospatial-Intelligence Agency warns that cancelled electronic navigational charts may cause unintended ECDIS behavior on some systems, including Navy VMS 9.5 and Raytheon Anschutz Synapsis NX. Cancelled Electronic Navigational Chart (enc) Advisory | HYDROPAC 1823/25 2025-07-17 |
| 7 | 413 d | Other | Cancelled electronic navigational charts may cause unintended behavior in some ECDIS systems, including reinstallation of recently cancelled charts. Cancelled Electronic Navigational Chart (enc) Advisory | HYDROARC 103/25 2025-07-17 |
| 8 | 413 d | Other | The National Geospatial-Intelligence Agency advises that cancelled electronic navigational charts may cause unintended behavior on electronic chart display systems. Cancelled Electronic Navigational Chart (enc) Advisory | HYDROLANT 1204/25 2025-07-17 |
| 9 | 285 d | Other | Twenty-two ocean bottom moorings are deployed one meter above the ocean floor until further notice in Davis Strait. Davis Strait · Davis Strait | NAVAREA IV 1292/25 2025-11-21 |
| 10 | 216 d | Other | NAVAREA VII 038 of 2026: (30 jan 26) 1. afmet zsj - radio weather facsimile service off the air 2. until… | NAVAREA 7 38/26 2026-01-30 |
| 11 | 183 d | Other | NATO operation Sea Guardian is underway in the Mediterranean Sea, requesting merchant vessels to report suspicious activity. Mediterranean Sea | NAVAREA III 36/26 2026-03-04 |
| 12 | 164 d | Other | Porcupine Abyssal Plain ODAS buoy moved to 48-56.3N 016-22.5W, cancelling warning 59/26. Western Approaches To United Kingdom and Ireland · Porcupine Abyssal Plain · North Atlantic Ocean | NAVAREA I 61/26 2026-03-23 |
| 13 | 152 d | Other | A semi-submerged mooring light buoy with a flashing white light is at position 20-16.32S 116-16.58E. Indian Ocean | AUSCOAST 130/26 2026-04-04 |
| 14 | 152 d | Other | A flashing white mooring buoy in the eastern Indian Ocean near Australia is semi-submerged at 20-16.32S 116-16.58E. Eastern Indian Ocean · Australia · Indian Ocean | HYDROPAC 1015/26 2026-04-04 |
| 15 | 96 d | Other | The vessel Dependable is conducting cable lay operations from 38-25S 144-28E to 40-22S 137-28E, with 1.5 nautical mile clearance requested. Great Australian Bight | AUSCOAST 208/26 2026-05-30 |
| 16 | 63 d | Other | Anchoring prohibited in a bounded area in the Persian Gulf off the United Arab Emirates between latitudes 25-24N and 25-28N, longitudes 055-05E and 055-10E. Persian Gulf · U.A.E · Persian Gulf | HYDROPAC 1903/26 2026-07-02 |
| 17 | 48 d | Other | U.S. Coast Guard remote communication facility in Honolulu has unreliable transmissions; broadcasts moved to Guam, DSC responses to Point Reyes. North Pacific · Hawaii · North Atlantic Ocean | NAVAREA XII 486/26 2026-07-16 |
| 18 | 46 d | Other | Fish farms are established in four areas near the Strait of Hormuz, Iran. Strait of Hormuz · Iran · Persian Gulf | HYDROPAC 2075/26 2026-07-19 |
| 19 | 44 d | Other | The Wave Hub NW buoy near Lundy, northwest of Saint Ives, has its Automatic Identification System inoperative at 50-23.1N 005-38.2W. Lundy · Celtic Sea | UKWZ 453/26 2026-07-21 |
| 20 | 39 d | Other | A tide gauge is established at 15 meters depth in Kara Sea, Russia at 73-08.24N 080-26.79E, wide berth requested. Kara Sea · Russia · Kara Sea | HYDROARC 149/26 2026-07-26 |
| 21 | 38 d | Other | NAVAREA VII 217 of 2026: (27 jul 26) 1. namibia - offshore orange river mouth 2. charts san 75 (int 2630),… South Atlantic Ocean | NAVAREA 7 217/26 2026-07-27 |
| 22 | 36 d | Other | NAVAREA VII 221 of 2026: (29 jul 26) 1. south atlantic ocean - ne sector - offshore oranjemund 2. charts san… South Atlantic Ocean | NAVAREA 7 221/26 2026-07-29 |
| 23 | 30 d | Other | The Neart na Gaoithe E and S buoys in the Forth have inoperative AIS at 56-14.3N 002-08.6W and 56-12.3N 002-09.8W. Forth · North Sea | UKWZ 471/26 2026-08-03 |
| 24 | 28 d | Other | Norwegian government restricts Russian fishing vessels to three ports: Baatsfjord, Kirkenes, Tromsoe, banning access to other mainland ports from October 13, 2022. | NAVAREA 19 45/26 2026-08-06 |
| 25 | 27 d | Other | Medium and high frequency radio and digital selective calling services across the entire Azores Archipelago are not operational, and coverage is not guaranteed. Acores · Radio Services | NAVAREA II 297/26 2026-08-07 |
| 26 | 17 d | Other | Eight 6-meter yellow buoys with flashing lights deployed within 1.5 nautical miles of 39-50.14 S 145-48.24 E; 2.5 nautical miles clearance requested. Bass Strait | AUSCOAST 276/26 2026-08-17 |
| 27 | 8 d | Other | Motor vessel ALSALAM II suffers a security incident and anchors at 26-23.40N 056-30.50E in the Strait of Hormuz, Oman; vessels keep clear. Strait of Hormuz · Oman · Persian Gulf | HYDROPAC 2446/26 2026-08-26 |
| 28 | 0 d | Other | Tide data are unreliable from gauges at Turtle Head, Ince Point, Goods Island, and Nardana Patches in Torres Strait. | AUSCOAST 287/26 2026-09-03 |