Nav aids

Longships light 50-04N 005-45W unreliable 301100Z to 310400Z jul

Celtic Sea · HYDROLANT 2128/01

What this record establishes

Archived notice · 2001-07-31 15:00Z

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 1620/01 300731Z JUL 01; NAVAREA VI 221/01 290200Z JUL 01. Issued 2001-07-30 10:50Z. 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
Celtic Sea. The parsed report position is 50.067, -5.750. 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

Current notices and reporting history in the Celtic Sea →

Activity windows · 1 in this warning

opens (UTC)closes (UTC)locallength
2001-07-30 11:00Z2001-07-31 04:00Z—17 h

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

issued
2001-07-30 10:50Z
status
Archived notice
self-cancels
2001-07-31 15:00Z
authority
WZ 1620/01 300731Z JUL 01; NAVAREA VI 221/01 290200Z JUL 01
NAVAREA
NAVAREA VI · named as the source of this relay
issued by
WZ
sea
Celtic Sea
position
50.067, -5.750
source
NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

CHART 36140 (12TH ED). 
1. LONGSHIPS LIGHT 50-04N 005-45W UNRELIABLE
   301100Z TO 310400Z JUL.
2. CANCEL HYDROLANT 1873/01(22) AND 2054/01(23).
3. CANCEL THIS MSG 311500Z JUL.

Reading this warning

Chart reference
The number of the nautical chart on which the reported position lies.
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.
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.

All warning terms →

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

1387 within 180 nm since 1997 · 4 in the last 12 months · 0 listed in force now

97
00
05
10
15
20
25
26

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

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

Record snapshot 2026-10-03 02:04Z; 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.