Nav aids

Dgps station at point lynas light 53-25N 004-17W unreliable 250900Z to 251100Z, 260900Z to 261000Z and…

Irish Sea and St. George's Channel · HYDROLANT 1406/02

What this record establishes

Archived notice · 2002-06-27 13:00Z

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 995,996/02 242317Z JUN 02. Issued 2002-06-25 05:10Z. 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 53.417, -4.283. 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 Irish Sea and St. George's Channel →

Activity windows · 3 in this warning

opens (UTC)	closes (UTC)	local	length
2002-06-25 09:00Z	2002-06-25 11:00Z	—	2 h
2002-06-26 09:00Z	2002-06-26 10:00Z	—	1 h
2002-06-27 09:00Z	2002-06-27 12:00Z	—	3 h

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

issued: 2002-06-25 05:10Z
status: Archived notice
self-cancels: 2002-06-27 13:00Z
authority: WZ 995,996/02 242317Z JUN 02
issued by: WZ
sea: Irish Sea and St. George's Channel
position: 53.417, -4.283
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

CHART 36122 (12TH ED).
1. DGPS STATION AT POINT LYNAS LIGHT 53-25N 004-17W
   UNRELIABLE 250900Z TO 251100Z, 260900Z TO 261000Z
   AND 270900Z TO 271200Z JUN.
2. CANCEL THIS MSG 271300Z JUN.

Reading this warning

Chart reference: The number of the nautical chart on which the reported position lies.
GNSS / GPS: Satellite positioning — GPS and other systems — and the testing, jamming and interference that make it unreliable in an area.
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.

All warning terms →

Collected reports in this area · aids-to-navigation notices

1703 within 180 nm since 1997 · 4 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.

Bull point light in 51-12.00N 004-12.10W unreliable2026-09-24
Roker pier light 54-55.30N 001-21.20W unreliable2026-09-05
Mew island light 54-41.90N 005-30.80W unreliable2026-08-11
Mf dsc and r/t services off air at: a. bawdsey 51-59.60N 001-24.50E2026-08-01
NAVTEX station portpatrick (o) 54-50.63N 005-07.46W off air 020800Z to 031600Z oct2024-10-01
Balbriggan island light 53-36.80N 006-10.80W unreliable2024-09-25

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

134 aids-to-navigation notices listed in force · see all

Record snapshot 2026-10-04 03:12Z; 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.