Hazardous operations 0530Z to 1530Z daily 21 thru 28 apr and 02 thru 19 may in area bound by 39-42.84N…
Mediterranean Sea - Western Basin · HYDROLANT 855/23
What this record establishes
Archived notice · 2023-05-19 16:30Z
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 III 39/23 202129Z APR 23.. Issued 2023-04-21 00:30Z. 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
- Mediterranean Sea - Western Basin. 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 Mediterranean Sea - Western Basin →
Activity windows · 8 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-04-21 05:30Z | 2023-04-21 15:30Z | — | 10 h |
| 2023-04-22 05:30Z | 2023-04-22 15:30Z | — | 10 h |
| 2023-04-23 05:30Z | 2023-04-23 15:30Z | — | 10 h |
| 2023-04-24 05:30Z | 2023-04-24 15:30Z | — | 10 h |
| 2023-04-25 05:30Z | 2023-04-25 15:30Z | — | 10 h |
| 2023-04-26 05:30Z | 2023-04-26 15:30Z | — | 10 h |
| 2023-04-27 05:30Z | 2023-04-27 15:30Z | — | 10 h |
| 2023-04-28 05:30Z | 2023-04-28 15:30Z | — | 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
- 2023-04-21 00:30Z
- status
- Archived notice
- self-cancels
- 2023-05-19 16:30Z
- authority
- NAVAREA III 39/23 202129Z APR 23.
- NAVAREA
- NAVAREA III · named as the source of this relay
- sea
- Mediterranean Sea - Western Basin
- position
- 39.764, 8.436
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
WESTERN MEDITERRANEAN SEA. SARDINIA. DNC 08. 1. HAZARDOUS OPERATIONS 0530Z TO 1530Z DAILY 21 THRU 28 APR AND 02 THRU 19 MAY IN AREA BOUND BY 39-42.84N 008-26.78E, 39-42.84N 008-23.18E, 39-44.34N 008-22.48E, 39-46.04N 008-22.68E, 39-47.54N 008-23.78E, 39-48.54N 008-25.18E, 39-49.04N 008-27.98E, 39-48.14N 008-29.98E, 39-44.24N 008-28.88E. 2. CANCEL THIS MSG 191630Z MAY 23.
Reading this warning
- DNC (Digital Nautical Chart)
- A reference to one of the regions of NGA's Digital Nautical Chart, used to tell the reader which charts a warning affects.
- 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.
- 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
417 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.
- Hazardous operations 0600Z to 2200Z daily 21 and 22 mar in area bound by 38-52.00N 011-22.00E, 38-51.00N…2023-03-19
- Hazardous operations 0530Z to 1530Z daily 28 apr thru 27 may except saturdays and sundays in area bound by…2022-04-27
- Hazardous operations 070600Z to 071800Z in area bound by 38-57-00N 008-37-06E, 38-56-24N 008-31-42E,…2022-04-05
- Gunnery exercises 0530Z to 2030Z daily 28 thru 31 mar and 04 thru 07 apr and 0530Z to 1530Z daily 01 and 08…2022-03-26
- Gunnery exercises 0630Z to 1630Z daily 22 thru 25 mar and 0530Z to 2030Z daily 28 mar thru 01 apr and 04…2022-03-18
- Hazardous operations 0700Z to 1700Z daily 14, 15 and 17 mar 22 in area bound by 38-57.00N 008-37.06E,…2022-03-11
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
28 military exercises listed in force · see all
Record snapshot 2026-10-01 20:44Z; 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.