GPS unreliable 16 oct thru 18 nov in area within 96 miles of 47-43.8N 122-43.8W
The Coastal Waters of Southeast Alaska and British Columbia · NAVAREA XII 451/17
What this record establishes
Archived notice · 2017-10-13 17:04Z
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 GPS 28/17 121802Z OCT 17.. Issued 2017-10-12 19:37Z. 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 47.730, -122.730 with a 96.0 nm radius. It is a position in the source message, not a live location. Check the original wording for limits and qualifications.
- issued
- 2017-10-12 19:37Z
- status
- Archived notice
- authority
- COGARD NAVCEN GPS 28/17 121802Z OCT 17.
- NAVAREA
- NAVAREA XII
- issued by
- COGARD NAVCEN
- sea
- The Coastal Waters of Southeast Alaska and British Columbia
- position
- 47.730, -122.730 · r 96.0 nm
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
EASTERN NORTH PACIFIC. WASHINGTON. 1. GPS UNRELIABLE 16 OCT THRU 18 NOV IN AREA WITHIN 96 MILES OF 47-43.8N 122-43.8W. 2. CANCEL THIS MSG 19 NOV 17.
Reading this warning
- GNSS / GPS
- Satellite positioning — GPS and other systems — and the testing, jamming and interference that make it unreliable in an area.
- Inoperative / unreliable / off air
- An aid or radio service is not working as charted or published.
- 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.
Collected reports in this area · aids-to-navigation notices
44 within 180 nm since 2014 · 1 in the last 12 months · 1 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.
- Uscg remote communication facility astoria 46-12.40N 123-57.40W mf and hf transmit and receive capabilites…2026-09-04
- Uscg remote communication facility astoria (w) 46-10.00N 123-49.00W off air2025-06-07
- NAVTEX station astoria (w) 46-10.00N 123-49.00W off air 281500Z mar to 022000Z apr2024-03-28
- NAVTEX station astoria (w) 46-12.40N 123-57.38W unreliable2024-02-07
- NAVTEX station amphitrite point (h) 48-55.28N 125-32.38W off air2024-02-02
- NAVTEX station astoria (w) 46-10.00N 123-49.00W off air2024-01-30
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
- Bellingham, wa 98225, USASpills · 60.6 nm
- Uscg remote communication facility astoria (w) 46-10.00N 123-49.00W off airNav aids · 103.9 nm
Worldwide in the collected sources
140 aids-to-navigation notices listed in force · see all
Record snapshot 2026-09-28 10:59Z; 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.