Surveys

Scientific mooring with top float at 42 meters established at 75-06.02N 168-00.04W in Chukchi Sea.

Arctic Ocean · HYDROARC 23/24

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 11/24 232200Z FEB 24.. Issued 2024-02-24 02:18Z. 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 75.100, -168.001. 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 Arctic Ocean →

issued: 2024-02-24 02:18Z
status: Cancelled notice
authority: NAVAREA XVII 11/24 232200Z FEB 24.
NAVAREA: NAVAREA XVII · named as the source of this relay
sea: Arctic Ocean
position: 75.100, -168.001
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 42 METERS
ESTABLISHED IN 75-06.02N 168-00.04W.

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.

All warning terms →

Collected reports in this area · survey operations

9 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 35 meters, established in 74-31.38N 161-56.54W2023-10-25
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
Chukchi Sea2013-10-10
B. 72-31.517N 164-05.944W at 50 meters2012-08-18
B. 71-40.353N 154-59.742W2012-02-28

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 19:43Z; 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.