NOTICE ADVISORY TO NAVSTAR USERS (NANU) #001-94004 SUBJ: PRN13 UNUSABLE 004/0900-004/0910 1. CONDITION: PRN13 (SVN09) WAS UNUSABLE ON DAY 004 (04 JAN 94) BEGINNING 0900 UTC UNTIL DAY 004 AT 0910 UTC. 2. POC: CAPT THOMPSON AT COMMERCIAL (719) 550-6378 OR DSN 560-6378.