Exercises

Hazardous operations 240900Z to 261200Z and 270900Z to 281200Z jul in area bound by 43-55.00N 030-30.00E,…

Black Sea · HYDROLANT 1636/23

What this record establishes

Archived notice · 2023-07-21 09:10Z

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) · ROMANIA 93/23 201302Z JUL 23.. Issued 2023-07-20 14:38Z. 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
Black 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 Black Sea →

Activity windows · 2 in this warning

opens (UTC)closes (UTC)locallength
2023-07-24 09:00Z2023-07-26 12:00Z—51 h
2023-07-27 09:00Z2023-07-28 12:00Z—27 h

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

issued
2023-07-20 14:38Z
status
Archived notice
self-cancels
2023-07-28 13:00Z
authority
ROMANIA 93/23 201302Z JUL 23.
issued by
ROMANIA
sea
Black Sea
position
43.833, 30.750
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

BLACK SEA.
ROMANIA.
DNC 10.
1. HAZARDOUS OPERATIONS 240900Z TO 261200Z AND
   270900Z TO 281200Z JUL IN AREA BOUND BY
   43-55.00N 030-30.00E, 43-55.00N 031-00.00E,
   43-45.00N 031-00.00E, 43-45.00N 030-30.00E.
2. CANCEL THIS MSG 281300Z JUL 23.

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

1333 within 180 nm since 1999 · 6 in the last 12 months · 2 listed in force now

99
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

32 military exercises listed in force · see all

Record snapshot 2026-09-27 11:02Z; 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.