NOTICE ADVISORY TO NAVSTAR USERS (NANU) #051-94043 SUBJ: PRN03 SET UNUSABLE DAY 043 AT 1431 UTC. 1. CONDITION: PRN03 (SVN11) WAS UNUSABLE ON DAY 043 (12 FEB 94) BEGINNING 1431 UTC UNTIL FURTHER NOTICE. 2. USERS OF GPS ARE CAUTIONED THAT THE SYSTEM IS NOT YET FULLY OPERATIONAL. 3. POC: CAPT THOMPSON AT COMMERCIAL (719) 550-6378 OR DSN: 560-6378.