Exercises

Hazardous operations 041800Z to 041930Z, 0800Z to 1000Z, 1300Z to 1500Z and 1800Z to 1930Z daily 05 and 06…

Aegean Sea · HYDROLANT 845/20

What this record establishes

Archived notice · 2020-03-06 20:30Z

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) · GREEK NAVTEX IRAKLEIO 146/20 041740Z MAR 20.. Issued 2020-03-04 17:41Z. 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.

Current notices and reporting history in the Aegean Sea →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2020-03-04 18:00Z	2020-03-04 19:30Z	—	1 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: 2020-03-04 17:41Z
status: Archived notice
self-cancels: 2020-03-06 20:30Z
authority: GREEK NAVTEX IRAKLEIO 146/20 041740Z MAR 20.
issued by: GREEK NAVTEX IRAKLEIO
sea: Aegean Sea
position: 36.923, 27.277
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

AEGEAN SEA.
DNC 10.
1. HAZARDOUS OPERATIONS 041800Z TO 041930Z,
   0800Z TO 1000Z, 1300Z TO 1500Z AND
   1800Z TO 1930Z DAILY 05 AND 06 MAR
   IN AREAS BOUND BY:
   A. 36-53.97N 027-21.30E, 36-53.97N 027-23.05E,
      36-49.50N 027-23.05E, 36-49.50N 027-21.30E.
   B. 36-55.90N 027-15.35E, 36-55.83N 027-17.90E,
      36-54.97N 027-17.90E, 36-54.97N 027-15.35E.
2. CANCEL THIS MSG 062030Z MAR 20.

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.
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.
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

1227 within 180 nm since 1998 · 1 in the last 12 months · 1 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.

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

Missile operations 0530Z to sunset daily every wednesday thru saturday until 14 jun and 16 seb thru 31 dec…Missiles · 108.9 nm
Hazardous operations sunrise to sunset daily until 14 jun and 16 sep thru 31 dec in area bound by 38-16.00N…Exercises · 110.4 nm

Worldwide in the collected sources

9 military exercises listed in force · see all

Record snapshot 2026-10-04 02:02Z; 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.