Other

Radar jamming exercises 0800Z to 1600Z daily 13 mar thru 06 apr in area within 27 miles of 57-21.50N…

North Atlantic Ocean · HYDROLANT 520/23

What this record establishes

Archived notice · 2023-04-06 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) · WZ 180/23 080149Z MAR 23.. Issued 2023-03-08 01:56Z. 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 Atlantic Ocean. The parsed report position is 57.358, -7.398 with a 27.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.

Current notices and reporting history in the North Atlantic Ocean →

Activity windows · 25 in this warning

opens (UTC)closes (UTC)locallength
2023-03-13 08:00Z2023-03-13 16:00Z—8 h
2023-03-14 08:00Z2023-03-14 16:00Z—8 h
2023-03-15 08:00Z2023-03-15 16:00Z—8 h
2023-03-16 08:00Z2023-03-16 16:00Z—8 h
2023-03-17 08:00Z2023-03-17 16:00Z—8 h
2023-03-18 08:00Z2023-03-18 16:00Z—8 h
2023-03-19 08:00Z2023-03-19 16:00Z—8 h
2023-03-20 08:00Z2023-03-20 16:00Z—8 h
… 17 more

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

issued
2023-03-08 01:56Z
status
Archived notice
self-cancels
2023-04-06 17:00Z
authority
WZ 180/23 080149Z MAR 23.
issued by
WZ
sea
North Atlantic Ocean
position
57.358, -7.398 · r 27.0 nm
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH ATLANTIC.
LITTLE MINCH.
SCOTLAND.
DNC 19.
1. RADAR JAMMING EXERCISES 0800Z TO 1600Z DAILY
   13 MAR THRU 06 APR IN AREA WITHIN 27 MILES OF
   57-21.50N 007-23.90W.
2. CANCEL THIS MSG 061700Z APR 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.
GNSS / GPS
Satellite positioning — GPS and other systems — and the testing, jamming and interference that make it unreliable in an area.
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.
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.

All warning terms →

Collected reports in this area · other warnings

179 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now

99
00
05
10
15
20
24

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

23 other warnings listed in force · see all

Record snapshot 2026-10-02 06:09Z; source collection times vary.

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.