Exercises

Hazardous operations 16 jan thru 12 mar, 16 thru 24 mar, 26 mar thru 29 apr, 04 may thru 14 jun, 16 sep thru…

Aegean Sea · HYDROLANT 153/21

What this record establishes

Archived notice · 2021-10-05 13:33Z

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 50/21 161201Z JAN 21.. Issued 2021-01-16 12:03Z. 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
Aegean 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

Current notices and reporting history in the Aegean Sea →

issued
2021-01-16 12:03Z
status
Archived notice
authority
NAVAREA III 50/21 161201Z JAN 21.
NAVAREA
NAVAREA III · named as the source of this relay
sea
Aegean Sea
position
37.264, 26.226
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

AEGEAN SEA.
DNC 09.
1. HAZARDOUS OPERATIONS 16 JAN THRU 12 MAR,
   16 THRU 24 MAR, 26 MAR THRU 29 APR,
   04 MAY THRU 14 JUN, 16 SEP THRU 27 OCT,
   29 OCT THRU 19 NOV, 22 NOV THRU 23 DEC AND
   26 THRU 30 DEC DURING DAYLIGHT HOURS
   EXCEPT SATURDAYS, SUNDAYS AND HOLIDAYS
   IN AREA BOUND BY
   37-27.0N 026-17.0E, 37-08.5N 026-27.5E,
   37-05.0N 026-09.0E, 37-24.0N 026-00.0E,
   37-24.0N 026-04.0E.
2. CANCEL THIS MSG 31 DEC 21.

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.

All warning terms →

Collected reports in this area · military exercises

1293 within 180 nm since 1998 · 2 in the last 12 months · 2 listed in force now

98
00
05
10
15
20
25
26

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

Worldwide in the collected sources

31 military exercises listed in force · see all

Record snapshot 2026-09-28 22:03Z; 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.