NOTICE ADVISORY TO NAVSTAR USERS (NANU) #042-94039 SUBJ: PRN13 UNUSABLE 039/1250-039/1255 1. CONDITION: PRN13 (SVN9) WAS UNUSABLE ON DAY 039 (08 FEB 94) BEGINNING 1250 UTC UNTIL DAY 039 AT 1255 UTC. 2. POC: CAPT THOMPSON AT COMMERCIAL (719) 550-6378 OR DSN 560-6378.