Prn 25 unusable 291800Z to 300001Z sep
GPS Satellite System · HYDROLANT 1834/10
What this record establishes
Archived notice · 2010-09-28 16:48Z
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) · NAVAREA I 279/10 280934Z SEP 10.. Issued 2010-09-28 13:02Z. 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.
Related notices and cancellation links
- Nga chart 37055 (0 ed)later cancellation notice
Activity windows · 1 in this warning
| opens (UTC) | closes (UTC) | local | length |
|---|---|---|---|
| 2010-09-29 18:00Z | 2010-09-30 00:01Z | — | 6 h 01 |
Parsed from the warning text; outside these windows the area is normally not active, but the warning stays in force until cancelled.
- issued
- 2010-09-28 13:02Z
- status
- Archived notice
- self-cancels
- 2010-09-30 01:01Z
- authority
- NAVAREA I 279/10 280934Z SEP 10.
- NAVAREA
- NAVAREA I · named as the source of this relay
- 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 25 UNUSABLE 291800Z TO 300001Z SEP. 2. CANCEL THIS MSG 300101Z 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
140 aids-to-navigation notices listed in force · see all
Record snapshot 2026-09-27 17:26Z; 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.