NOTICE ADVISORY TO NAVSTAR USERS (NANU) #037-94035 SUBJ: PRN13 UNUSABLE 035/2038-035/2057 1. CONDITION: PRN13 (SVN09) WAS UNUSABLE ON DAY 035 (04 FEB 94) BEGINNING 2038 UTC UNTIL DAY 035 AT 2057 UTC. 2. POC: CAPT THOMPSON AT COMMERCIAL (719) 550-6378 OR DSN 560-6378.