Hazardous operations 172150Z to 180200Z apr, alternate: a. 2150Z to 0200Z commencing daily 18 and 19 apr
North Atlantic Ocean · HYDROLANT 1138/01
What this record establishes
Archived notice · 2001-04-23 08:30Z
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 139/01 291400Z MAR 01. Issued 2001-04-12 18:04Z. 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.
Related notices and cancellation links
- M/V makedonia, nine persons on board, abandoned vicinity 35-19N 029-55Elater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 4 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2001-04-17 21:50Z | 2001-04-18 02:00Z | — | 4 h 10 |
| 2001-05-16 21:50Z | 2001-05-16 23:40Z | — | 1 h 50 |
| 2001-05-21 21:50Z | 2001-05-22 02:00Z | — | 4 h 10 |
| 2001-05-22 21:50Z | 2001-05-23 22:00Z | — | 24 h 10 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2001-04-12 18:04Z
- status
- Archived notice
- self-cancels
- 2001-05-23 23:00Z
- authority
- NAVAREA II 139/01 291400Z MAR 01
- NAVAREA
- NAVAREA II · named as the source of this relay
- sea
- North Atlantic Ocean
- position
- 46.458, -6.258
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. HAZARDOUS OPERATIONS 172150Z TO 180200Z APR, ALTERNATE:
A. 2150Z TO 0200Z COMMENCING DAILY 18 AND 19 APR.
B. 2150Z TO 0220Z COMMENCING DAILY 15 AND 17 MAY.
C. 162150Z TO 162340Z, 212150Z TO 220200Z AND
222150Z TO 232200Z MAY.
IN AREA BOUND BY 46-45N 006-11W, 46-29N 005-50W,
46-10N 006-20W, 46-26N 006-41W.
2. CANCEL THIS MSG 232300Z MAY.
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.
- 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.
Collected reports in this area · military exercises
507 within 180 nm since 1999 · 1 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.
- Special operations2026-10-02
- 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
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 2026-10-03 12:11Z; 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.