Hazardous operations 280001Z to 302359Z sep in area bound by 23-35.00N 017-00.00W, 23-35.08N 017-21.75W,…
North Atlantic Ocean · HYDROLANT 1913/26
What this record establishes
Cancelled notice · 2026-09-28 16:45Z
This notice disappeared from the issuing source's in-force list. No explicit recovery or all-clear is established by that removal.
- Source and dates
- NGA MSI in-force warnings (DailyMem*.txt). Issued 2026-09-26 16:29Z. First collected 2026-09-28 19:32Z; last seen in collection 2026-09-28 22:32Z. 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.
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2026-09-28 00:01Z | 2026-09-30 23:59Z | — | 71 h 58 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2026-09-26 16:29Z
- status
- Cancelled notice
- self-cancels
- 2026-10-01 01:00Z
- sea
- North Atlantic Ocean
- position
- 23.722, -17.150
- source
- NGA MSI in-force warnings (DailyMem*.txt) · first seen 2026-09-28 19:32Z
Original warning text
NORTH ATLANTIC. WESTERN SAHARA. 1. HAZARDOUS OPERATIONS 280001Z TO 302359Z SEP IN AREA BOUND BY 23-35.00N 017-00.00W, 23-35.08N 017-21.75W, 23-44.54N 017-19.04W, 23-52.58N 017-10.39W, 23-55.07N 017-00.00W. 2. CANCEL THIS MSG 010100Z OCT 26.
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
16 within 180 nm since 2000 · 7 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 operations2026-09-26
- Special operations2026-09-22
- Special operations2026-09-19
- Special operations2026-09-15
- Hazardous operations 020001Z to 022359Z sep in area bound by 23-35.00N 017-00.00W, 23-35.08N 017-21.75W,…2026-08-29
- Special operations2026-08-29
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
- Special operationsExercises · 11.7 nm
- Newly discovered dangersWrecks · 73.7 nm
Worldwide in the collected sources
31 military exercises listed in force · see all
Record snapshot 2026-09-28 22:33Z; 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.