Surveys

Sub-surface scientific moorings established in 71-00.13N 135-29.44W

Beaufort Sea · HYDROARC 306/19

What this record establishes

Archived notice · 2020-10-23 12:48Z

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) · NAVAREA XVII 121/19 040514Z DEC 19.. Issued 2019-12-04 05:17Z. 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
Beaufort Sea. The parsed report position is 71.002, -135.491. 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 Beaufort Sea →

issued
2019-12-04 05:17Z
status
Archived notice
authority
NAVAREA XVII 121/19 040514Z DEC 19.
NAVAREA
NAVAREA XVII · named as the source of this relay
sea
Beaufort Sea
position
71.002, -135.491
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BEAUFORT SEA.
CANADA.
DNC 27.
SUB-SURFACE SCIENTIFIC MOORINGS ESTABLISHED IN
71-00.13N 135-29.44W.

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

56 within 180 nm since 2006 · 0 in the last 12 months · 0 listed in force now

06
10
15
19

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 2026-10-02 19:46Z; 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.