Nav aids

Gustavus dgps station 58-25.1N 135-41.8W unusable 181900Z to 182300Z jan

The Coastal Waters of Southeast Alaska and British Columbia · NAVAREA XII 20/17

What this record establishes

Archived notice · 2017-01-19 00:01Z

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) · COGARD NAVCEN DGPS 16/17 131948Z JAN 17.. Issued 2017-01-13 19:53Z. 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: The Coastal Waters of Southeast Alaska and British Columbia. The parsed report position is 58.418, -135.697. 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 The Coastal Waters of Southeast Alaska and British Columbia →

Activity windows · 1 in this warning

opens (UTC)	closes (UTC)	local	length
2017-01-18 19:00Z	2017-01-18 23:00Z	—	4 h

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

issued: 2017-01-13 19:53Z
status: Archived notice
self-cancels: 2017-01-19 00:01Z
authority: COGARD NAVCEN DGPS 16/17 131948Z JAN 17.
NAVAREA: NAVAREA XII
issued by: COGARD NAVCEN
sea: The Coastal Waters of Southeast Alaska and British Columbia
position: 58.418, -135.697
source: NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z

Original warning text

EASTERN NORTH PACIFIC.
ALASKA-SOUTHEAST COAST.
CHART 16016.
1. GUSTAVUS DGPS STATION 58-25.1N 135-41.8W
   UNUSABLE 181900Z TO 182300Z JAN.
2. CANCEL THIS MSG 190001Z JAN 17.

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.
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

152 within 180 nm since 2006 · 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.

Biorka dgps station 56-51.3N 135-32.4W unusable2020-06-18
Biorka dgps station 56-51.3N 135-32.4W inoperative2019-09-25
Biorka dgps station 56-51.3N 135-32.4W unusable2019-08-06
Gustavus dgps station 58-25.1N 135-41.8W unreliable2019-06-27
Biorka dgps station 56-51.3N 135-32.4W unreliable2019-06-27
Biorka dgps station 56-51.3N 135-32.4W off air2019-05-14

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 2026-10-03 11:00Z; 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.