Radar jamming exercises 0830Z to 1700Z daily 25 thru 29 mar in area within 11 miles of 57-20.97N 007-24.00W
North Atlantic Ocean · HYDROLANT 581/24
What this record establishes
Archived notice · 2024-03-20 17:37Z
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 223/24 201311Z MAR 24.. Issued 2024-03-20 13:19Z. 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 Atlantic Ocean. The parsed report position is 57.349, -7.400 with a 11.0 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
- GPS jamming exercises 0830Z to 1700Z daily 25 thru 29 mar in area within 11 miles of 57-21.00N 007-24.00Wcancelled by this notice
- Cancel HYDROLANT 581/24 and this msg, exercises postponedlater cancellation notice
Current notices and reporting history in the North Atlantic Ocean →
Activity windows · 5 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2024-03-25 08:30Z | 2024-03-25 17:00Z | — | 8 h 30 |
| 2024-03-26 08:30Z | 2024-03-26 17:00Z | — | 8 h 30 |
| 2024-03-27 08:30Z | 2024-03-27 17:00Z | — | 8 h 30 |
| 2024-03-28 08:30Z | 2024-03-28 17:00Z | — | 8 h 30 |
| 2024-03-29 08:30Z | 2024-03-29 17:00Z | — | 8 h 30 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2024-03-20 13:19Z
- status
- Archived notice
- self-cancels
- 2024-03-29 18:00Z
- authority
- WZ 223/24 201311Z MAR 24.
- issued by
- WZ
- sea
- North Atlantic Ocean
- position
- 57.349, -7.400 · r 11.0 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 0830Z TO 1700Z DAILY 25 THRU 29 MAR IN AREA WITHIN 11 MILES OF 57-20.97N 007-24.00W. 2. CANCEL HYDROLANT 580/24. 3. CANCEL THIS MSG 291800Z MAR 24.
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.
- 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.
- 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.
Collected reports in this area · other warnings
179 within 180 nm since 1999 · 0 in the last 12 months · 0 listed in force now
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.
- Radar jamming exercises 0800Z to 1700Z daily 16 sep thru 11 oct in area within 25 miles of 57-21.00N…2024-09-11
- Cgoc stornoway mf r/t services at butt of lewis site 58-30.87N 006-15.68W unreliable2023-10-13
- Cgoc aberdeen mf dsc and r/t services at gregness site 57-07.65N 002-03.22W unreliable2023-08-09
- Radar jamming exercises 0800Z to 1600Z daily 13 mar thru 06 apr in area within 27 miles of 57-21.50N…2023-03-08
- All navigational aids at aberdeen offshore windfarm 57-13.4N 001-59.7W unreliable until 031300Z sep2021-08-30
- Kinnaird head light 57-41-51N 002-00-15W reduced intensity2021-07-07
Month of issue in the collected archive
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.