Surveys

Scientific mooring, top float 20 meters below surface, established in 54-16.62N 081-28.76W

Hudson Bay · NAVAREA IV 720/21

What this record establishes

Archived notice · 2023-08-04 16:40Z

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) · MCTS 182008Z AUG 21.. Issued 2021-08-18 23:08Z. 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
Hudson Bay. The parsed report position is 54.277, -81.479. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the Hudson Bay →

issued
2021-08-18 23:08Z
status
Archived notice
authority
MCTS 182008Z AUG 21.
NAVAREA
NAVAREA IV
issued by
MCTS
sea
Hudson Bay
position
54.277, -81.479
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

HUDSON BAY.
CANADA.
SCIENTIFIC MOORING, TOP FLOAT 20 METERS BELOW
SURFACE, ESTABLISHED IN 54-16.62N 081-28.76W.

Reading this warning

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

1 within 180 nm since 2021 · 0 in the last 12 months · 0 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

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

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 2026-10-01 20:28Z; 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.