Surveys

Scientific moorings established: a. BCE-18, 71-40.351N 154-59.975W, at depth 105 meters, top float 40 meters

Arctic Ocean · HYDROARC 297/18

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) · JAMSTEC 080716Z NOV 18.. Issued 2018-11-08 09:07Z. 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 72.465, -156.550. 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
2018-11-08 09:07Z
status
Archived notice
authority
JAMSTEC 080716Z NOV 18.
issued by
JAMSTEC
sea
Arctic Ocean
position
72.465, -156.550
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

CHUKCHI SEA.
BEAUFORT SEA.
ALASKA.
DNC 27.
CHART 16004.
SCIENTIFIC MOORINGS ESTABLISHED:
A. BCE-18, 71-40.351N 154-59.975W,
   AT DEPTH 105 METERS, TOP FLOAT 40 METERS.
B. BCC-18, 71-44.058N 155-09.663W,
   AT DEPTH 290 METERS, TOP FLOAT 40 METERS.
C. BCW-18, 71-47.771N 155-20.777W,
   AT DEPTH 169 METERS, TOP FLOAT 40 METERS.
D. NAP-18t, 74-39.018N 161-50.342W,
   AT DEPTH 1824 METERS, TOP FLOAT 24 METERS.
E. NBC-18t, 72-28.226N 155-24.295W,
   AT DEPTH 1980 METERS, TOP FLOAT 47 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

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 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.