GPS jamming exercises 0730Z to 1500Z daily 01 thru 26 may in area within 22 miles of 54-50.00N 004-56.00W
Irish Sea and St. George's Channel · HYDROLANT 892/23
What this record establishes
Archived notice · 2023-05-23 08:12Z
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 309/23 260801Z APR 23.. Issued 2023-04-26 09:39Z. 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
- Irish Sea and St. George's Channel. The parsed report position is 54.833, -4.933 with a 22.0 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
- Cancel HYDROLANT 892/23 and this msg, operations completedlater cancellation notice
Current notices and reporting history in the Irish Sea and St. George's Channel →
Activity windows · 26 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2023-05-01 07:30Z | 2023-05-01 15:00Z | — | 7 h 30 |
| 2023-05-02 07:30Z | 2023-05-02 15:00Z | — | 7 h 30 |
| 2023-05-03 07:30Z | 2023-05-03 15:00Z | — | 7 h 30 |
| 2023-05-04 07:30Z | 2023-05-04 15:00Z | — | 7 h 30 |
| 2023-05-05 07:30Z | 2023-05-05 15:00Z | — | 7 h 30 |
| 2023-05-06 07:30Z | 2023-05-06 15:00Z | — | 7 h 30 |
| 2023-05-07 07:30Z | 2023-05-07 15:00Z | — | 7 h 30 |
| 2023-05-08 07:30Z | 2023-05-08 15:00Z | — | 7 h 30 |
| … 18 more | |||
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2023-04-26 09:39Z
- status
- Archived notice
- self-cancels
- 2023-05-26 16:00Z
- authority
- WZ 309/23 260801Z APR 23.
- issued by
- WZ
- sea
- Irish Sea and St. George's Channel
- position
- 54.833, -4.933 · r 22.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
IRISH SEA. NORTH CHANNEL. SCOTLAND. DNC 20. 1. GPS JAMMING EXERCISES 0730Z TO 1500Z DAILY 01 THRU 26 MAY IN AREA WITHIN 22 MILES OF 54-50.00N 004-56.00W. IF EMERGENCY CONTACT FREUGH RANGE CONTROL, PHONE: 4417 7688 8932, 4417 7688 8930. 2. CANCEL THIS MSG 261600Z MAY 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.
Collected reports in this area · aids-to-navigation notices
2008 within 180 nm since 1998 · 9 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.
- Dubh artach light 56-08.0N 006-38.1W unreliable2026-09-17
- Dubh artach light 56-08.00N 006-38.10W unreliable2026-09-16
- Roker pier light 54-55.30N 001-21.20W unreliable2026-09-05
- RACON at hyskeir light 56-58.20N 006-40.80W inoperative2026-08-28
- Mf dsc and r/t services off air at: a. cullercoats 55-04.40N 001-27.80W2026-08-24
- Mf dsc and r/t services off air at: a. cullercoats 55-04.40N 001-27.80W2026-08-16
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
136 aids-to-navigation notices listed in force · see all
Record snapshot 2026-10-02 13:29Z; source collection times vary.
Nav aids
Lights extinguished, buoys off station, RACON/NAVTEX outages. All current aids-to-navigation notices →
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.