Surveys

Sub-surface scientific moorings established in: a. 71-36.007N 161-30.011W, at depth 48 meters

Arctic Ocean · HYDROARC 155/16

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) · USCGC HEALY 042121Z AUG 16.. Issued 2016-08-04 21:43Z. 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
Arctic Ocean. The parsed report position is 71.600, -161.514. 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
2016-08-04 21:43Z
status
Archived notice
authority
USCGC HEALY 042121Z AUG 16.
issued by
USCGC HEALY
sea
Arctic Ocean
position
71.600, -161.514
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

ARCTIC.
CHUKCHI SEA.
DNC 27.
CHART 16005.
SUB-SURFACE SCIENTIFIC MOORINGS ESTABLISHED IN:
A. 71-36.007N 161-30.011W, AT DEPTH 48 METERS.
B. 71-35.986N 161-31.653W, AT DEPTH 48 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.
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.

All warning terms →

Collected reports in this area · survey operations

51 within 180 nm since 2004 · 0 in the last 12 months · 1 listed in force now

04
05
10
15
20
24

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

J
F
M
A
M
J
J
A
S
O
N
D

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

Worldwide in the collected sources

54 survey operations listed in force · see all

Record snapshot 2026-10-02 13:50Z; 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.