The Northwestern Passages
IHO sea area 14 · -128° to -69° E, 64° to 82° N
- in force
- 6
- last 12 months
- 12
- archive messages
- 260
- categories
- 8
What the archive shows
260 messages are recorded since 2001-09-30 for the The Northwestern Passages. The selection uses the IHO sea area; a message may describe an exercise, equipment outage or continuing operation as well as a hazard report.
Nav aids accounts for 67 of 260 recorded messages (26%), the largest category group in this selection.
The NGA historical archive froze in 2024-05; live collection began 2026-08-17. Counts around that gap are incomplete, and changes in reporting volume do not establish changes in incident frequency.
- An older warning still listed in force · issued 2025-08-31 00:15ZA depth of 13.6 meters is reported in Lancaster Sound, Canada at 74-38.63N 091-20.54W.
In force now · 6
- HYDROARC 258/26 · Surveys2026-09-25A scientific mooring is established in Deese Strait, Canada, at 68-55.94N 105-49.66W, with top float at 122 meters.
- HYDROARC 256/26 · Surveys2026-09-25A scientific mooring with a top float at 69 meters is established in Queen Maud Gulf, Canada, at 68-48.95N 105-06.53W.
- HYDROARC 242/26 · Wrecks2026-09-18A 0.3 meter rock depth and a dangerous submerged rock are reported in Amundsen Gulf, Canada, at 70-32.05N 115-59.06W and 70-30.05N 116-04.70W.
- HYDROARC 178/25 · Wrecks2025-10-01Depths reported in Franklin Strait and McClintock Channel, Canada, range from 11.3 to 29.3 meters.
- HYDROARC 175/25 · Wrecks2025-09-29A reported depth of 33.6 meters in McClintock Channel, Canada at 76-40.36N 102-16.62W.
- HYDROARC 148/25 · Wrecks2025-08-31A depth of 13.6 meters is reported in Lancaster Sound, Canada at 74-38.63N 091-20.54W.
Longest in force
- HYDROARC 148/25 · Wrecks2025-08-31A depth of 13.6 meters is reported in Lancaster Sound, Canada at 74-38.63N 091-20.54W.
- HYDROARC 175/25 · Wrecks2025-09-29A reported depth of 33.6 meters in McClintock Channel, Canada at 76-40.36N 102-16.62W.
- HYDROARC 178/25 · Wrecks2025-10-01Depths reported in Franklin Strait and McClintock Channel, Canada, range from 11.3 to 29.3 meters.
- HYDROARC 242/26 · Wrecks2026-09-18A 0.3 meter rock depth and a dangerous submerged rock are reported in Amundsen Gulf, Canada, at 70-32.05N 115-59.06W and 70-30.05N 116-04.70W.
- HYDROARC 256/26 · Surveys2026-09-25A scientific mooring with a top float at 69 meters is established in Queen Maud Gulf, Canada, at 68-48.95N 105-06.53W.
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By category · available archive
| Nav aids | 67 | 26% |
| Surveys | 58 | 22% |
| Wrecks | 49 | 19% |
| Other | 47 | 18% |
| Incidents | 35 | 13% |
| Exercises | 2 | 1% |
| Quakes | 1 | 0% |
| Derelicts | 1 | 0% |
Archive · 254 cancelled
- HYDROARC 268/26 · Surveys2026-09-27 → 2026-09-28A scientific mooring with least depth 41 meters is established in Coronation Gulf, Canada at 68-27.66N 113-23.37W.
- HYDROARC 267/26 · Surveys2026-09-27 → 2026-09-28A scientific mooring with a least depth of 21 meters is established in Coronation Gulf, Canada, at 68-20.73N 112-21.13W.
- HYDROARC 266/26 · Surveys2026-09-26 → 2026-09-28A scientific mooring is established in Coronation Gulf, Canada, at 68-23.73N 110-00.91W, with a least depth of 19 meters; warning HYDROARC 264/26 is cancelled.
- HYDROARC 265/26 · Surveys2026-09-26 → 2026-09-28A scientific mooring is established in Deese Strait, Canada, at 68-55.72N 105-48.26W with least depth 20 meters; cancel HYDROARC 257/26.
- HYDROARC 263/26 · Surveys2026-09-26 → 2026-09-28A scientific mooring with a top float at 236 meters is established in Coronation Gulf, Canada, at 68-23.75N 109-59.54W.
- HYDROARC 257/26 · Surveys2026-09-25 → 2026-09-26A scientific mooring is established in Deese Strait, Canada at 68-55.72N 105-48.26W with a top float at 127 meters.
- HYDROARC 253/26 · Surveys2026-09-24 → 2026-09-24A scientific mooring is established in Queen Maud Gulf, Canada, at 68-39.93N 103-00.86W with a top float at 126 meters.
- HYDROARC 252/26 · Surveys2026-09-24 → 2026-09-24A scientific mooring is established in Queen Maud Gulf, Canada, at 68-53.41N 101-31.15W, with a top float at 49 meters.
- HYDROARC 250/26 · Surveys2026-09-23 → 2026-09-23Canada establishes scientific moorings at 69-42.02N 095-42.64W, least depth 43 meters, and 69-36.60N 095-20.92W, least depth 38 meters.
- HYDROARC 280/23 · Nav aids2023-11-01 → 2023-11-15Mcts iqaluit remote station resolute 74-45N 094-58W off air
- HYDROARC 279/23 · Nav aids2023-11-01 → 2023-11-15Mcts iqaluit remote station cambridge bay 69-07.00N 105-01.00W off air
- HYDROARC 272/23 · Wrecks2023-10-27 → 2026-08-14A 13.9 meter shoal is located in Lancaster Sound, Canada at 73 degrees 43 minutes north, 81 degrees 13 minutes west.
- HYDROARC 256/23 · Nav aids2023-10-16 → 2023-10-17Mcts iqaluit remote station resolute 74-45.00N 094-58.00W r/t frequencies 2582 khz and 4363 khz off air
- HYDROARC 243/23 · Nav aids2023-10-05 → 2026-08-14Front and rear range lights at Resolute Bay, Canada, are unlit; coordinates 74-41.20N 094-48.00W and 74-41.30N 094-48.00W.
- HYDROARC 240/23 · Surveys2023-10-02 → 2026-08-14A scientific mooring with a top float at 30 meters is established in Lancaster Sound, Canada, at 74-27.83N 090-32.81W.
- HYDROARC 239/23 · Surveys2023-10-02 → 2026-08-14A scientific mooring with a top float at 30 meters is located in Lancaster Sound, Canada at 74 degrees 08.75 minutes north, 091 degrees 02.83 minutes west.
- HYDROARC 212/23 · Wrecks2023-09-12 → 2023-09-26Shoals reported: a. 12.4 meters in 69-53.47N 083-23.07W
- HYDROARC 154/23 · Nav aids2023-08-09 → 2023-11-01Mcts iqaluit remote station cambridge bay 69-07.00N 105-01.00W mf and hf services off air
- HYDROARC 151/23 · Nav aids2023-08-05 → 2023-08-09Mcts iqaluit remote station cambridge bay 69-07.00N 105-01.00W hf r/t transmit services off air
- HYDROARC 148/23 · Incidents2023-08-03 → 2023-08-18Vessel reported sinking in 69-05.00N 105-31.00W
Sea boundaries: Flanders Marine Institute (2018), IHO Sea Areas v3, marineregions.org (CC BY 4.0). Not for navigation — follow official NAVAREA / coastal broadcasts.