Took off yesterday on a 30 min flight to nearby airport. The SV1000 reported that the "GPS POS1 FAIL" via the caution button. Sure enough no MAP, SYN VIS, or anything else GPS dependant. The PDF and ENG displays were normal. Since I had the iFy 720, I contiued to nearby airport. On restart, the SV1000 booted normally and the MAP came as did everything else GPS dependant. First time this has occurred. Approximately 20 hurs on SV since upgrade from D-180. Dan