Exercises

Hazardous operations 141200Z to 141600Z jul in area within ten miles of 54-07.2N 000-23.9E

North Sea · HYDROLANT 1855/21

What this record establishes

Archived notice · 2021-07-14 14:06Z

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) · WZ 752/21 140500Z JUL 21.. Issued 2021-07-14 08:19Z. 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
North Sea. The parsed report position is 54.120, 0.398 with a 10.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Related notices and cancellation links

Current notices and reporting history in the North Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2021-07-14 12:00Z2021-07-14 16:00Z—4 h

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

issued
2021-07-14 08:19Z
status
Archived notice
self-cancels
2021-07-14 17:00Z
authority
WZ 752/21 140500Z JUL 21.
issued by
WZ
sea
North Sea
position
54.120, 0.398 · r 10.0 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

NORTH SEA.
ENGLAND.
DNC 20.
1. HAZARDOUS OPERATIONS 141200Z TO 141600Z JUL
   IN AREA WITHIN TEN MILES OF 54-07.2N 000-23.9E.
2. CANCEL THIS MSG 141700Z JUL 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.
Within a radius of
A circular area — every position within a stated distance of a point.
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

31 within 180 nm since 2005 · 0 in the last 12 months · 0 listed in force now

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

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 2026-10-04 00:03Z; 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.