Bottom scientific mooring extending 3.5 meters above sea floor established in 70-33.81N 127-41.57W at depth…
The Northwestern Passages · HYDROARC 301/18
What this record establishes
Archived notice · 2019-04-05 11:14Z
This notice comes from the historical archive. Its archived status does not establish when or how the reported situation ended.
- Source and dates
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · NAVAREA XVII 122/18 082246Z NOV 18.. Issued 2018-11-08 22:46Z. First collected 2026-08-17 13:38Z; last seen in collection 2026-08-17 15:46Z. Collection dates record ingestion, not a new incident or a fresh field observation.
- Location covered
- The Northwestern Passages. The parsed report position is 70.564, -127.693. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Beaufort Seacancelled by this notice
Current notices and reporting history in the The Northwestern Passages →
- issued
- 2018-11-08 22:46Z
- status
- Archived notice
- authority
- NAVAREA XVII 122/18 082246Z NOV 18.
- NAVAREA
- NAVAREA XVII · named as the source of this relay
- sea
- The Northwestern Passages
- position
- 70.564, -127.693
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BEAUFORT SEA. CANADA-NORTH COAST. DNC 27. CHART 15940. 1. BOTTOM SCIENTIFIC MOORING EXTENDING 3.5 METERS ABOVE SEA FLOOR ESTABLISHED IN 70-33.81N 127-41.57W AT DEPTH 40 METERS. 2. CANCEL HYDROARC 112/12.
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.
- Chart reference
- The number of the nautical chart on which the reported position lies.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROARC
- The U.S. long-range warning series for the Arctic Ocean.
Collected reports in this area · survey operations
49 within 180 nm since 2006 · 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 12 meters below surface, established in 70-34.7N 123-38.2W2020-09-22
- Sub-surface scientific moorings established in 71-00.13N 135-29.44W2019-12-04
- Sub-surface scientific moorings established in: a. 70-51.79N 135-01.45W, top float 35 meters2019-08-06
- Scientific mooring, top float 348 meters below surface, established in 70-12.06N 123-09.47W2018-10-03
- Scientific mooring, top float 149 meters below surface, established in 70-23.62N 124-32.43W2018-10-03
- Scientific mooring, top float 75 meters below surface, established in 71-18.66N 127-35.62W2018-10-03
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
50 survey operations listed in force · see all
Record snapshot 2026-09-24 23:11Z; 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.