Exercises

Hazardous operations 160001Z feb to 082259Z mar in areas bound by: a. 36-00N 015-00E 37-50N 015-00E, 37-50N…

Ionian Sea · HYDROLANT 436/21

What this record establishes

Archived notice · 2021-02-15 20:35Z

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 130/21 142258Z FEB 21.. Issued 2021-02-14 22:58Z. 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
Ionian 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 Ionian Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2021-02-16 00:01Z2021-03-08 22:59Z—502 h 58

Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.

issued
2021-02-14 22:58Z
status
Archived notice
self-cancels
2021-03-08 23:59Z
authority
NAVAREA III 130/21 142258Z FEB 21.
NAVAREA
NAVAREA III · named as the source of this relay
sea
Ionian Sea
position
36.917, 15.792
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN MEDITERRANEAN SEA.
IONIAN SEA.
SICILY.
DNC 09.
1. HAZARDOUS OPERATIONS 160001Z FEB TO 082259Z MAR
   IN AREAS BOUND BY:
   A. 36-00N 015-00E 37-50N 015-00E,
      37-50N 016-35E 36-00N 016-35E.
   B. 37-25N 015-08E 37-25N 015-19E,
      37-20N 015-19E 37-20N 015-08E.
   C. 37-25N 015-25E 37-25N 015-55E,
      37-15N 015-55E 37-15N 015-25E.
   D. 37-08N 015-25E 37-08N 016-10E,
      36-45N 016-10E 36-45N 015-25E.
2. CANCEL THIS MSG 082359Z MAR 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.
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

274 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

Worldwide in the collected sources

28 military exercises listed in force · see all

Record snapshot 2026-10-01 22:24Z; 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.