Hazardous operations 1430Z to 0230Z commencing daily 26, 28 may and 01 thru 03 jun in area bound by 47-49.2N…
Bay of Biscay · HYDROLANT 904/04
What this record establishes
Archived notice · 2004-06-04 03:30Z
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) · NAVAREA II 179/04 250742Z MAY 04; NAVAREA III 274/04 250751Z MAY 04; PVMM. Issued 2004-05-25 09:50Z. 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
Current notices and reporting history in the Bay of Biscay →
- issued
- 2004-05-25 09:50Z
- status
- Archived notice
- self-cancels
- 2004-06-04 03:30Z
- authority
- NAVAREA II 179/04 250742Z MAY 04; NAVAREA III 274/04 250751Z MAY 04; PVMM
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- Bay of Biscay
- position
- 47.605, -4.423
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 1430Z TO 0230Z COMMENCING DAILY 26, 28 MAY AND 01 THRU 03 JUN IN AREA BOUND BY 47-49.2N 004-38.2W, 47-38.6N 004-03.2W, 47-22.3N 004-14.3W, 47-36.0N 004-48.0W. 2. CANCEL HYDROLANT 877/04(53). 3. CANCEL HYDROLANT 901/04(GEN), 892/04 REFERS. 4. CANCEL THIS MSG 040330Z JUN.
Reading this warning
- 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.
- 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.
- 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.
Collected reports in this area · military exercises
495 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.
- Gunnery exercises 021100Z to 021300Z and 021400Z to 021600Z may in area bound by 48-20.40N 004-37.00W,…2024-05-02
- Gunnery exercises 010700Z to 010900Z may in area bound by 48-21.00N 005-20.00W, 48-21.00N 004-53.00W,…2024-04-30
- Gunnery exercises 291400Z to 291600Z apr in area bound by 48-20.40N 004-37.00W, 48-20.01N 004-39.52W,…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 200600Z to 200900Z apr in area bound by 48-20.40N 004-37.00W, 48-20.01N 004-39.52W,…2024-04-19
- 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
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
17 military exercises listed in force · see all
Record snapshot 2026-09-25 01:51Z; 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.