Surveys

Nga chart 16005 (10TH ed)

Chukchi Sea · HYDROARC 239/11

What this record establishes

Archived notice · 2012-08-02 00:01Z

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) · USCGC HEALY 080025Z DEC 11.. Issued 2011-12-09 14:23Z. 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: Chukchi Sea. The parsed report position is 71.216, -164.301. 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 Chukchi Sea →

issued: 2011-12-09 14:23Z
status: Archived notice
authority: USCGC HEALY 080025Z DEC 11.
issued by: USCGC HEALY
sea: Chukchi Sea
position: 71.216, -164.301
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ALASKA-NORTHWEST COAST.
CHUKCHI SEA.
NGA CHART 16005 (10TH ED).
1. SCIENTIFIC MOORING, TOP FLOAT 36 METERS,
   ESTABLISHED UNTIL 01 AUG 12
   IN 71-12.974N 164-18.050W.
2. CANCEL THIS MSG 02 AUG 2012.

Reading this warning

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.
CANCEL THIS MSG: The warning's own expiry: a line telling the reader when the message cancels itself.

All warning terms →

Collected reports in this area · survey operations

46 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.

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 2026-10-03 02:03Z; 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.