A scientific mooring with its top float at 35 meters is established in the Chukchi Sea at 74-31.38N 161-56.54W.
Arctic Ocean · HYDROARC 269/23
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 XVII 77/23 250542Z OCT 23.. Issued 2023-10-25 05:52Z. 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
- Arctic Ocean. The parsed report position is 74.523, -161.942. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2023-10-25 05:52Z
- status
- Cancelled notice
- authority
- NAVAREA XVII 77/23 250542Z OCT 23.
- NAVAREA
- NAVAREA XVII · named as the source of this relay
- sea
- Arctic Ocean
- position
- 74.523, -161.942
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:41Z
Original warning text
CHUKCHI SEA. DNC 27. SCIENTIFIC MOORING, TOP FLOAT 35 METERS, ESTABLISHED IN 74-31.38N 161-56.54W.
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
30 within 180 nm since 2004 · 0 in the last 12 months · 1 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 moorings established: a. BCE-24, in 71-40.40N 154-59.90W, at depth 108 meters, top float 20 meters2024-12-17
- Scientific mooring, top float 42 meters established in 75-06.02N 168-00.04W2024-02-24
- Scientific moorings established: a. 75-10.91N 157-07.14W2020-10-19
- Scientific moorings established in: a. 73-18.23N 160-47.02W, top float 48 meters2018-11-08
- Scientific moorings established: a. BCE-18, 71-40.351N 154-59.975W, at depth 105 meters, top float 40 meters2018-11-08
- Scientific moorings established in: a. 72-28.34N 155-24.39W, top float 62 meters2016-09-08
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 2026-10-01 17:01Z; 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.