Exercises

Hazardous operations

Baltic Sea · HYDROLANT 1594/11

What this record establishes

Archived notice · 2011-10-04 17:00Z

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) · LITHUANIA 54/11 300834Z SEP 11 - NAVAREA V S 834/11 30 SEP 11.. Issued 2011-09-30 14:11Z. 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
Baltic 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 Baltic Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2011-10-04 08:00Z2011-10-04 16:00Z—8 h

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

issued
2011-09-30 14:11Z
status
Archived notice
self-cancels
2011-10-04 17:00Z
authority
LITHUANIA 54/11 300834Z SEP 11 - NAVAREA V S 834/11 30 SEP 11.
NAVAREA
NAVAREA V · named as the source of this relay
issued by
LITHUANIA
sea
Baltic Sea
position
55.492, 20.843
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN BALTIC SEA.
LITHUANIA.
HAZARDOUS OPERATIONS.
1. HAZARDOUS OPERATIONS 040800Z TO 041600Z OCT
   IN AREA BOUND BY
   55-37.0N 020-46.0E, 55-34.0N 021-00.0E,
   55-25.0N 021-00.0E, 55-22.0N 020-46.0E,
   55-25.0N 020-42.0E, 55-34.0N 020-42.0E.
2. CANCEL HYDROLANT 1342/11(24).
3. CANCEL THIS MSG 041700Z OCT.

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.
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.
Cancellation reference
A line that cancels an earlier warning by its number, such as CANCEL HYDROLANT 1085/12.
HYDROLANT
The U.S. long-range warning series for Atlantic waters outside NAVAREA IV, including the eastern Atlantic, the Mediterranean and adjoining seas.
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

313 within 180 nm since 2003 · 1 in the last 12 months · 0 listed in force now

03
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

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 17:43Z; 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.