NOTICE ADVISORY TO NAVSTAR USERS (NANU) #058-90090 SUBJ: PRN9/SVN6 USABLE 1. CONDITION: PRN9/SVN6 BECAME USABLE ON 31 MAR 90 (JULIAN DAY 090) AT 0045 UTC. 2. RECOMMENDED ACTIONS: USERS CAN BEGIN USING NAVIGATION DATA FROM PRN9/SVN6 BEGINNING ON 31 MAR 90 (JULIAN DAY 090) AT 0045 UTC. POC: MAJOR FAUVER AT COMMERCIAL: (719) 550-6379 OR AUTOVON: 560-6379.