A scientific mooring with top float 15 meters below surface is established in Coronation Gulf, Canada at 68-20.75N 112-21.12W.
The Northwestern Passages · HYDROARC 224/22
What this record establishes
Cancelled notice · 2026-08-14 18:10Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XVIII 70/22 191742Z AUG 22.. Issued 2022-08-19 18:08Z. First collected 2026-08-17 13:41Z; last seen in collection 2026-08-17 15:50Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- The Northwestern Passages. The parsed report position is 68.346, -112.352. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Current notices and reporting history in the The Northwestern Passages →
- issued
- 2022-08-19 18:08Z
- status
- Cancelled notice
- authority
- NAVAREA XVIII 70/22 191742Z AUG 22.
- NAVAREA
- NAVAREA XVIII · named as the source of this relay
- sea
- The Northwestern Passages
- position
- 68.346, -112.352
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:41Z
Original warning text
CORONATION GULF. CANADA. DNC 28. SCIENTIFIC MOORING, TOP FLOAT 15 METERS BELOW SURFACE, ESTABLISHED IN 68-20.75N 112-21.12W.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- Scientific mooring
- Instruments anchored to the seabed and held up by floats, sometimes just below the surface, left for months to measure the ocean.
- Position (degrees and minutes)
- How warnings write positions: degrees, a hyphen, then minutes, with N/S and E/W — 49-40.8N 003-43.8W.
Collected reports in this area · survey operations
16 within 180 nm since 2010 · 8 in the last 12 months · 2 listed in force now
Counts include repeat notices about the same situation. NGA archive coverage ends 2024-05; live collection began 2026-08-17. The period between them is incomplete. An empty year is not evidence that no hazards occurred.
- Scientific mooring, least depth 41 meters, established in 68-27.66N 113-23.37W2026-09-27
- Scientific mooring, least depth 21 meters, established in 68-20.73N 112-21.13W2026-09-27
- Scientific mooring established in 68-23.73N 110-00.91W, least depth 19 meters2026-09-26
- Scientific mooring established in in 68-55.72N 105-48.26W, least depth 20 meters2026-09-26
- Scientific mooring established in 68-23.75N 109-59.54W, top float 236 meters2026-09-26
- Scientific mooring established in 68-55.94N 105-49.66W, top float 122 meters2026-09-25
Month of issue in the collected archive
All available years combined. Uneven collection and repeat bulletins affect these counts; this chart does not measure the seasonality or probability of incidents.
Nearby notices listed in force · within 120 nm
No other collected notice is currently listed in force within this radius. This does not establish safe conditions.
Worldwide in the collected sources
56 survey operations listed in force · see all
Record snapshot 2026-10-02 16:59Z; source collection times vary.
Surveys
Hydrographic and scientific survey vessels, often towing long arrays. All current survey operations →
Not for navigation. This is a re-rendering of an official navigational warning for awareness; mariners must use official NAVAREA broadcasts and their national MSI service.