Hazardous operations 300800Z to 301830Z may in area within 40 miles of 45-00.00N 005-00.00W
Bay of Biscay · HYDROLANT 1157/23
What this record establishes
Archived notice · 2023-05-30 19:30Z
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 171/23 251200Z MAY 23.. Issued 2023-05-25 12:07Z. 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
- Bay of Biscay. The parsed report position is 45.000, -5.000 with a 40.0 nm radius. 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 Bay of Biscay →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-05-30 08:00Z | 2023-05-30 18:30Z | — | 10 h 30 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2023-05-25 12:07Z
- status
- Archived notice
- self-cancels
- 2023-05-30 19:30Z
- authority
- AVURNAV BREST 171/23 251200Z MAY 23.
- issued by
- AVURNAV BREST
- sea
- Bay of Biscay
- position
- 45.000, -5.000 · r 40.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BAY OF BISCAY. SPAIN. DNC 08. 1. HAZARDOUS OPERATIONS 300800Z TO 301830Z MAY IN AREA WITHIN 40 MILES OF 45-00.00N 005-00.00W. 2. CANCEL THIS MSG 301930Z MAY 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.
- 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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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.
Collected reports in this area · military exercises
317 within 180 nm since 1999 · 1 in the last 12 months · 1 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.
- Special operations2026-10-02
- Hazardous operations 301100 to 301400 and 301900Z to 302200Z apr in area bound by 44-35.00N 001-32.00W,…2024-04-26
- Gunnery exercises 231300Z to 231500Z and 231700Z to 231900Z apr in area bound by 47-46.40N 005-00.00W,…2024-04-22
- Gunnery exercises 200800Z to 201000Z apr in area bound by 47-46.40N 005-00.00W, 47-48.30N 005-38.10W,…2024-04-19
- Gunnery exercises 180800Z to 181000Z apr in area bound by 47-08.90N 003-26.00W, 47-14.00N 003-08.00W,…2024-04-17
- Gunnery exercises 121200Z to 121330Z in area bound by 47-46.40N 005-00.00W, 47-48.30N 005-38.10W, 47-47.13N…2024-04-11
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
9 military exercises listed in force · see all
Record snapshot 2026-10-02 19:20Z; 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.