Underwater ordnance detonations 250800Z to 251800Z aug vicinity 39-37.3N 009-43.5E
Tyrrhenian Sea · HYDROLANT 1780/99
What this record establishes
Archived notice · 1999-08-25 19:00Z
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) · MARIDI SARDEGNA 098/99 242200Z AUG 99. Issued 1999-08-24 22:15Z. 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
- Tyrrhenian Sea. The parsed report position is 39.622, 9.725. 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 Tyrrhenian Sea →
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-08-25 08:00Z | 1999-08-25 18:00Z | — | 10 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 1999-08-24 22:15Z
- status
- Archived notice
- self-cancels
- 1999-08-25 19:00Z
- authority
- MARIDI SARDEGNA 098/99 242200Z AUG 99
- issued by
- MARIDI SARDEGNA
- sea
- Tyrrhenian Sea
- position
- 39.622, 9.725
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. UNDERWATER ORDNANCE DETONATIONS 250800Z TO 251800Z AUG VICINITY 39-37.3N 009-43.5E. 4000 METER BERTH REQUESTED. 2. CANCEL THIS MSG 251900Z AUG.
Reading this warning
- Unexploded ordnance
- Bombs, shells, mines or torpedoes found on the seabed or washed up, and the operations to remove or destroy them.
- 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.
- 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.
- Wide berth requested
- Keep well clear — or, when a distance is given ("TWO MILE BERTH REQUESTED"), at least that far away.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · ordnance operations
55 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.
- Torpedo firing exercises 01 thru 04 apr within 2000 meters of 36-59.7N 010-16.2E2013-03-27
- Unexploded ordnance within 300 meters of 39-52.43N 009-49.04E2006-11-24
- Unexploded ordnance in 39-31.47N 009-39.63E2006-11-16
- Underwater ordnance detonations in progress thru 30 aug vicinity 40-56.6N 008-21.3E2006-08-24
- Underwater ordnance detonations in progress thru 30 aug vicinity 39-08.5N 009-39.9E2006-08-24
- Underwater ordnance detonations in progress thru 29 aug vicinity 39-28.7N 009-43.4E2006-08-23
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
0 ordnance operations listed in force · see all
Record snapshot 2026-10-03 19:16Z; source collection times vary.
Ordnance
Ordnance disposal, underwater detonations and unexploded ordnance. All current ordnance operations →
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.