Gunnery exercises 0700Z to 1630Z daily 03 thru 05, 08 thru 12, and 15 thru 19 mar in area bound by 40-15N…
Tyrrhenian Sea · HYDROLANT 431/99
What this record establishes
Archived notice · 1999-03-19 00:00Z
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). Issued 1999-03-03 10:30Z. 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
- Tyrrhenian Sea. 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
- North rona light 59-07N 005-49W unreliablecancelled by this notice
Current notices and reporting history in the Tyrrhenian Sea →
Activity windows · 3 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 1999-03-03 07:00Z | 1999-03-03 16:30Z | — | 9 h 30 |
| 1999-03-04 07:00Z | 1999-03-04 16:30Z | — | 9 h 30 |
| 1999-03-05 07:00Z | 1999-03-05 16:30Z | — | 9 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
- 1999-03-03 10:30Z
- status
- Archived notice
- self-cancels
- 1999-03-19 17:30Z
- sea
- Tyrrhenian Sea
- position
- 39.619, 10.881
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
1. GUNNERY EXERCISES 0700Z TO 1630Z DAILY 03 THRU 05, 08 THRU 12, AND 15 THRU 19 MAR IN AREA BOUND BY 40-15N 010-00E, 40-15N 011-50E, 38-48N 011-50E, 39-10N 010-00E, 39-28N 009-48E, 39-43N 009-40E. 2. CANCEL HYDROLANT 430/99(35), AID RESTORED. 3. CANCEL THIS MSG 191730Z MAR.
Reading this warning
- Gunnery and live firing
- Naval or coastal guns firing into a sea area for practice, at stated times.
- 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.
- 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.
- 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
347 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 0530Z to 1530Z daily 21 thru 28 apr and 02 thru 19 may in area bound by 39-42.84N…2023-04-21
- Hazardous operations 0600Z to 2200Z daily 24 thru 26 mar in area bound by 39-40.00N 014-14.00E, 39-26.00N…2023-03-21
- 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
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 20:28Z; 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.