Other

Reports have been verified that some saab R3-AIS transponders, when combined with an older GPS receiver,…

HYDROPAC 440/08

issued: 2008-03-06 20:08Z
status: cancelled 2008-04-20 08:54Z (archive)
authority: EMAIL FROM USCG 060651Z MAR 08.
source: nga_json · first seen 2026-08-17 13:38Z

Original warning text

REPORTS HAVE BEEN VERIFIED THAT SOME SAAB R3-AIS TRANSPONDERS, WHEN COMBINED
WITH AN OLDER GPS RECEIVER, HAVE STOPPED WORKING WHILE GPS SATELLITE PRN32
IS IN VIEW. VESSELS AFFECTED ARE REPORTED BEING 'INVISIBLE' TO OTHER AIS
EQUIPPED VESSELS IN ADDITION TO SOME AIS EQUIPPED SHORE STATIONS. IT HAS
BEEN REPORTED VESSELS EQUIPPED WITH THE SAAB R3-AIS TRANSPONDERS CONTINUE TO
RECEIVE AIS INFORMATION FROM OTHER AIS EQUIPPED VESSELS. ALL VESSELS ARE
ADVISED TO CHECK THE PROPER OPERATION OF THEIR AIS AND GPS EQUIPMENT.
GPS PROBLEMS SHOULD BE REPORTED TO THE USCG NAVIGATION CENTER AT
WWW.NAVCEN.USCG.GOV/GPS/USERINPUTGPS.HTM OR CONTACT THE USCG NAVIGATION
INFORMATION SERVICE AT 703 313 5900.

Timeline

HYDROPAC messages in force 200800Z apr 2008cancelled by · 2008-04-20

Nearby now · within 120 nm

Nothing else in force within 120 nm.

Worldwide now

68 other warnings in force · see all

Other

Everything the classifier did not place elsewhere. All current other warnings →

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.