Surveys

Scientific moorings established until 31 oct 18 in: a. 71-44.04N 155-09.67W, top float 40 meters

Arctic Ocean · HYDROARC 293/17

What this record establishes

Archived notice · 2018-11-01 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) · JAMSTEC 250735Z SEP 17.. Issued 2017-09-25 08:51Z. 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 71.502, -158.424. 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
2017-09-25 08:51Z
status
Archived notice
authority
JAMSTEC 250735Z SEP 17.
issued by
JAMSTEC
sea
Arctic Ocean
position
71.502, -158.424
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BEAUFORT SEA.
CHUKCHI SEA.
DNC 27.
CHART 16003, 16004.
1. SCIENTIFIC MOORINGS ESTABLISHED UNTIL 31 OCT 18 IN:
   A. 71-44.04N 155-09.67W, TOP FLOAT 40 METERS.
   B. 71-40.38N 155-00.03W, TOP FLOAT 40 METERS.
   C. 71-47.77N 155-20.68W, TOP FLOAT 40 METERS.
   D. 68-01.97N 168-50.17W, TOP FLOAT 35 METERS.
   E. 72-28.31N 155-25.00W, TOP FLOAT 42 METERS.
   F. 73-18.23N 160-47.02W, TOP FLOAT 48 METERS.
2. CANCEL THIS MSG 01 NOV 18.

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.
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

63 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

56 survey operations listed in force · see all

Record snapshot 2026-10-01 21:04Z; 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.