NOTICE ADVISORY TO NAVSTAR USERS (NANU) #052-94043 SUBJ: PRN03 SET USABLE DAY 043 AT 1855 UTC. 1. CONDITION: PRN03 (SVN11) WAS SET USABLE ON DAY 043 (12 FEB 94) AT 1855 UTC. 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.