NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: GPS System failure
From: Greg R_
Date: 2014 Jun 16, 17:19 -0700
From: Greg R_
Date: 2014 Jun 16, 17:19 -0700
Do you have RAIM (Receiver Autonomous Integrity Monitoring) on those GPS units? It's required for aviation use (at least for IFR (Instrument Flight Rules)) - not sure if marine units have that, even as an option. Based on your description, it sounds like the GPS satellite geometry might not have been optimal for obtaining a fix during that time (the GNSS satellites were most likely in different positions, and hence you didn't lose position using them). -- GregR On 6/16/2014 12:11:10 PM, Jeremy C (noreply_jeremyc@fer3.com) wrote: > I was at anchor off of Ashdod, Israel and I had a system failure of the > GPS. All 3 GPS receivers on my bridge lost position simultaneously, and > then > began tracking again about 30 minutes later. Oddly enough, my GNSS > receiver (GPS and GLONASS) worked perfectly and did not lose position. > Any thoughts on this? > > Jeremy > > [link: > 'http://fer3.com/arc/m2.aspx/GPS-System-failure-JeremyC-jun-2014-g28047']
