Hazardous operations 041500Z to 041800Z and 042030Z to 042300Z apr in area bound by 44-31.00N 001-34.00W,…
Bay of Biscay · HYDROLANT 684/24
What this record establishes
Archived notice · 2024-04-05 00:01Z
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 93/24 021734Z APR 24.. Issued 2024-04-02 17:46Z. 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 map shows an area described by the warning; the listed coordinate is its representative center. Check the original wording for limits and qualifications.
Related notices and cancellation links
- Ile de penfret light 47-43.30N 003-57.20W range reduced to 11 miles until 02 aprcancelled by this notice
Current notices and reporting history in the Bay of Biscay →
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2024-04-04 15:00Z | 2024-04-04 18:00Z | — | 3 h |
| 2024-04-04 20:30Z | 2024-04-04 23:00Z | — | 2 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
- 2024-04-02 17:46Z
- status
- Archived notice
- self-cancels
- 2024-04-05 00:01Z
- authority
- AVURNAV BREST 93/24 021734Z APR 24.
- issued by
- AVURNAV BREST
- sea
- Bay of Biscay
- position
- 44.450, -1.650
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
BAY OF BISCAY. FRANCE. DNC 08. 1. HAZARDOUS OPERATIONS 041500Z TO 041800Z AND 042030Z TO 042300Z APR IN AREA BOUND BY 44-31.00N 001-34.00W, 44-31.00N 001-44.00W, 44-23.00N 001-44.00W, 44-23.00N 001-34.00W. 2. CANCEL HYDROLANT 674/24. 3. CANCEL THIS MSG 050001Z 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.
- 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.
- 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.
- Cancellation reference
- A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
- HYDROLANT
- The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
- 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
98 within 180 nm since 2009 · 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.
- 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 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 110600Z to 110800Z and 111200Z to 111400Z apr in area bound by 47-08.90N 003-26.00W,…2024-04-11
- Gunnery exercises 071300Z to 071530Z apr in area bound by 47-08.90N 003-26.00W, 47-14.00N 003-08.00W,…2024-04-05
- Gunnery exercises 160800Z to 161100Z mar in area bound by 46-07.70N 005-00.00W, 46-20.00N 004-53.80W,…2024-03-16
- Gunnery exercises 130800Z to 131000Z mar in area bound by 47-08.90N 003-26.00W, 47-14.00N 003-08.00W,…2024-03-12
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
28 military exercises listed in force · see all
Record snapshot 2026-10-01 03:35Z; 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.