Exercises

Hazardous operations 1200Z to 1600Z daily 31 may and 06 jun and 0600Z to 1600Z daily 01 and 07 jun in area…

North Atlantic Ocean · HYDROLANT 1179/23

What this record establishes

Archived notice · 2023-06-07 17:00Z

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) · AVURNAV BREST 174/23 261529Z MAY 23.. Issued 2023-05-26 15:35Z. 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
North Atlantic Ocean. The map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.

Current notices and reporting history in the North Atlantic Ocean →

issued
2023-05-26 15:35Z
status
Archived notice
self-cancels
2023-06-07 17:00Z
authority
AVURNAV BREST 174/23 261529Z MAY 23.
issued by
AVURNAV BREST
sea
North Atlantic Ocean
position
46.375, -10.583
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

CELTIC SEA.
EASTERN NORTH ATLANTIC.
DNC 08.
1. HAZARDOUS OPERATIONS 1200Z TO 1600Z DAILY
   31 MAY AND 06 JUN AND 0600Z TO 1600Z DAILY
   01 AND 07 JUN IN AREA BOUND BY
   47-30.00N 013-00.00W, 47-30.00N 008-10.00W,
   45-15.00N 008-10.00W, 45-15.00N 013-00.00W.
2. CANCEL THIS MSG 071700Z JUN 23.

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.
Hazardous operations
NGA's heading for activities that make an area dangerous — most often rocket launches, space debris and weapons firings, and some open-ended danger areas.
Area bound by
Introduces a list of positions that are the corners of an area — the polygon the warning applies to.
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.
Date-time group (DTG)
A compact UTC timestamp — day, hour and minute followed by Z — such as 201500Z for the 20th at 15:00 UTC.

All warning terms →

Collected reports in this area · military exercises

61 within 180 nm since 1999 · 1 in the last 12 months · 1 listed in force now

99
00
05
10
15
20
25
26

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

9 military exercises listed in force · see all

Record snapshot 2026-10-02 19:52Z; source collection times vary.

Exercises

Gunnery, firing and naval exercise areas. All current military exercises →

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.