Prn 13 unusable 020820Z to 022020Z sep
GPS Satellite System · NAVAREA IV 275/11
What this record establishes
Archived notice · 2011-08-27 09:08Z
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 634/11 251814Z AUG 11.. Issued 2011-08-25 20:38Z. 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
- GPS Satellite System. No usable coordinates were parsed; a location-based nearby search is unavailable. Check the original wording for limits and qualifications.
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2011-09-02 08:20Z | 2011-09-02 20:20Z | — | 12 h |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2011-08-25 20:38Z
- status
- Archived notice
- self-cancels
- 2011-09-02 21:20Z
- authority
- COGARD NAVCEN GPS 634/11 251814Z AUG 11.
- NAVAREA
- NAVAREA IV
- issued by
- COGARD NAVCEN
- source
- NGA MSI broadcast-warn JSON (archive, frozen 2024-05) · first seen 2026-08-17 13:38Z
Original warning text
GPS SATELLITE SYSTEM. 1. PRN 13 UNUSABLE 020820Z TO 022020Z SEP. 2. CANCEL THIS MSG 022120Z SEP.
Reading this warning
- GNSS / GPS
- Satellite positioning — GPS and other systems — and the testing, jamming and interference that make it unreliable in an area.
- 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.
Nearby notices listed in force · within 120 nm
No parsed position is available for this comparison.
Worldwide in the collected sources
134 aids-to-navigation notices listed in force · see all
Record snapshot 2026-10-02 16:58Z; 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.