Ordnance detonation 150900Z to 151430Z jun, alternate 160900Z to 161430Z jun within 1000 meters of 41-07.9N…
Tyrrhenian Sea · HYDROLANT 1238/99
What this record establishes
Archived notice · 1999-06-16 15:30Z
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) · 1. MARISARDEGNA 68/99 142130Z JUN 99; 2. WZ 1102/99 141512Z JUN 99. Issued 1999-06-14 21:22Z. 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 41.132, 9.637 with a 0.5 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
Related notices and cancellation links
Current notices and reporting history in the Tyrrhenian Sea →
Activity windows · 2 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-06-15 09:00Z | 1999-06-15 14:30Z | — | 5 h 30 |
| 1999-06-16 09:00Z | 1999-06-16 14:30Z | — | 5 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
- 1999-06-14 21:22Z
- status
- Archived notice
- self-cancels
- 1999-06-16 15:30Z
- authority
- 1. MARISARDEGNA 68/99 142130Z JUN 99; 2. WZ 1102/99 141512Z JUN 99
- issued by
- MARISARDEGNA
- sea
- Tyrrhenian Sea
- position
- 41.132, 9.637 · r 0.5 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. ORDNANCE DETONATION 150900Z TO 151430Z JUN, ALTERNATE 160900Z TO 161430Z JUN WITHIN 1000 METERS OF 41-07.9N 009-38.2E. 2. CANCEL HYDROLANT 1219/99(37). 3. CANCEL THIS MSG 161530Z JUN.
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.
- Within a radius of
- A circular area — every position within a stated distance of a point.
- 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 · ordnance operations
71 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.
- 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
- Underwater ordnance detonations 13 jul, alternate 14 jul in 41-17.2N 009-30.6E2006-07-12
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
0 ordnance operations listed in force · see all
Record snapshot 2026-10-03 19:52Z; 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.