Exercises

Hazardous operations: a. 0600Z to 1800Z daily 01, 02, 05 thru 09, 13 thru 16, 19 thru 23 and 26 thru 30 apr…

Tyrrhenian Sea · HYDROLANT 526/04

What this record establishes

Archived notice · 2004-04-30 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) · MARISARDEGNA 59/04 300723Z MAR 04. Issued 2004-03-30 12:40Z. 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.

Current notices and reporting history in the Tyrrhenian Sea →

issued
2004-03-30 12:40Z
status
Archived notice
self-cancels
2004-04-30 19:00Z
authority
MARISARDEGNA 59/04 300723Z MAR 04
issued by
MARISARDEGNA
sea
Tyrrhenian Sea
position
39.766, 10.639
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

1. HAZARDOUS OPERATIONS:
   A. 0600Z TO 1800Z DAILY 01, 02, 05 THRU 09,
      13 THRU 16, 19 THRU 23 AND 26 THRU 30 APR
      IN AREA BOUND BY
      40-00N 010-00E, 40-00N 010-30E,
      39-10N 010-30E, 39-10N 010-00E,
      39-26N 009-38E, 39-38N 009-38E.
   B. 0700Z TO 1530Z DAILY 01, 06 THRU 08,
      13 THRU 15, 20 THRU 22 AND 27 THRU 29 APR
      IN AREA BOUND BY
      40-15N 010-00E, 40-15N 011-31E,
      40-11N 011-33E, 39-32N 011-38E,
      38-52N 011-28E, 39-10N 010-00E,
      39-28N 009-38E, 39-43N 009-40E.
   C. 0700Z TO 1530Z DAILY 01, 06 THRU 08,
      13 THRU 15, 20 THRU 22 AND 27 THRU 29 APR
      IN AREA BOUND BY
      40-37N 009-50E, 40-40N 010-35E,
      40-40N 010-50E, 39-20N 010-50E,
      39-20N 009-47E, 39-24N 009-40E.
2. CANCEL THIS MSG 301900Z APR.

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.
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.

All warning terms →

Collected reports in this area · military exercises

353 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
23

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.

Month of issue in the collected archive

J
F
M
A
M
J
J
A
S
O
N
D

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 2026-10-02 16:32Z; 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.