All navigational aids at aberdeen offshore windfarm 57-13.4N 001-59.7W unreliable until 031300Z sep
North Sea · HYDROLANT 2228/21
What this record establishes
Archived notice · 2021-09-03 14:00Z
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 943/21 301336Z AUG 21.. Issued 2021-08-30 15:47Z. 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 57.223, -1.995. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2021-08-30 15:47Z
- status
- Archived notice
- self-cancels
- 2021-09-03 14:00Z
- authority
- WZ 943/21 301336Z AUG 21.
- issued by
- WZ
- sea
- North Sea
- position
- 57.223, -1.995
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
NORTH SEA. SCOTLAND. DNC 20. 1. ALL NAVIGATIONAL AIDS AT ABERDEEN OFFSHORE WINDFARM 57-13.4N 001-59.7W UNRELIABLE UNTIL 031300Z SEP. 2. CANCEL THIS MSG 031400Z SEP 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.
- Offshore wind farm
- Construction or maintenance at an offshore wind farm: turbine foundations, jack-up vessels and export cables.
- 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.
- Inoperative / unreliable / off air
- An aid or radio service is not working as charted or published.
- 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.
- CANCEL THIS MSG
- The warning's own expiry: a line telling the reader when the message cancels itself.
Collected reports in this area · other warnings
250 within 180 nm since 1997 · 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
- Radar jamming exercises 0830Z to 1700Z daily 25 thru 29 mar in area within 11 miles of 57-20.97N 007-24.00W2024-03-20
- Cgoc stornoway mf r/t services at butt of lewis site 58-30.87N 006-15.68W unreliable2023-10-13
- Sumburgh head light 59-51.20N 001-16.50W ranged reduced to 12 miles2023-10-13
- 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
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 2026-09-29 09:23Z; 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.