Scientific moorings are established at several positions in Lancaster Sound, Canada, with top floats between 26 and 246 meters.
The Northwestern Passages · HYDROARC 291/22
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 97/22 231734Z SEP 22.. Issued 2022-09-23 22:33Z. 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 74.368, -90.901. 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
- 2022-09-23 22:33Z
- status
- Cancelled notice
- authority
- NAVAREA XVIII 97/22 231734Z SEP 22.
- NAVAREA
- NAVAREA XVIII · named as the source of this relay
- sea
- The Northwestern Passages
- position
- 74.368, -90.901
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:41Z
Original warning text
LANCASTER SOUND. CANADA. DNC 28. SCIENTIFIC MOORINGS ESTABLISHED: A. 74-36.37N 091-15.05W, TOP FLOAT 147 METERS. B. 74-36.27N 091-15.73W, TOP FLOAT 59 METERS. C. 74-36.24N 091-15.17W, TOP FLOAT 44 METERS. D. 74-04.85N 090-01.25W, TOP FLOAT 32 METERS. E. 74-12.57N 090-49.64W, TOP FLOAT 246 METERS. F. 74-11.87N 090-49.04W, TOP FLOAT 26 METERS. G. 74-35.73N 091-08.05W, TOP FLOAT 72 METERS. H. 74-12.67N 090-46.24W, TOP FLOAT 61 METERS. I. 74-11.89N 090-46.29W, TOP FLOAT 36 METERS.
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
7 within 180 nm since 2008 · 0 in the last 12 months · 0 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, top float 30 meters, established in 74-27.83N 090-32.81W2023-10-02
- Scientific mooring, top float 30 meters, established in 74-08.75N 091-02.83W2023-10-02
- Nga chart 15863 (0 ed)2010-08-01
- Nga chart 15863 (0 ed)2010-07-04
- Bottom scientific moorings established: a. top float 117 meters 72-00.48N 094-38.74W2008-09-05
- Bottom scientific moorings established thru aug 09: a. top float 125 meters ACW07-1 in 76-32.057N 090-28.450W2008-09-05
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
- 13.6 meter depth reported in 74-38.63N 091-20.54WWrecks · 18 nm
Worldwide in the collected sources
55 survey operations listed in force · see all
Record snapshot 2026-10-01 08:30Z; 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.