Exercises

Gunnery exercises 231300Z to 231500Z and 231700Z to 231900Z apr in area bound by 47-46.40N 005-00.00W,…

Celtic Sea · HYDROLANT 857/24

What this record establishes

Archived notice · 2024-04-23 20:00Z

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 117/24 221550Z APR 24.. Issued 2024-04-22 16:23Z. 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: Celtic Sea. 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 Celtic Sea →

Activity windows · 2 in this warning

opens (UTC)	closes (UTC)	local	length
2024-04-23 13:00Z	2024-04-23 15:00Z	—	2 h
2024-04-23 17:00Z	2024-04-23 19:00Z	—	2 h

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued: 2024-04-22 16:23Z
status: Archived notice
self-cancels: 2024-04-23 20:00Z
authority: AVURNAV BREST 117/24 221550Z APR 24.
issued by: AVURNAV BREST
sea: Celtic Sea
position: 47.462, -5.494
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BAY OF BISCAY.
CELTIC SEA.
FRANCE.
DNC 08.
1. GUNNERY EXERCISES 231300Z TO 231500Z AND
   231700Z TO 231900Z APR IN AREA BOUND BY
   47-46.40N 005-00.00W, 47-48.30N 005-38.10W,
   47-47.13N 005-43.42W, 47-44.69N 005-49.43W,
   47-40.92N 005-55.15W, 47-37.29N 005-58.41W,
   47-34.60N 006-00.00W, 47-08.10N 006-00.00W,
   47-09.60N 005-04.40W, 47-16.80N 005-00.10W.
2. CANCEL THIS MSG 232000Z APR 24.

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.
Gunnery and live firing: Naval or coastal guns firing into a sea area for practice, at stated times.
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.
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.

All warning terms →

Collected reports in this area · military exercises

503 within 180 nm since 1999 · 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

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

31 military exercises listed in force · see all

Record snapshot 2026-09-30 07:24Z; 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.