NOTICE ADVISORY TO NAVSTAR USERS (NANU) #032-90045 SUBJ: PRN18 AVAILABLE 2226 UTC, 14 FEB 90 (DAY 45) 1. CONDITION: PRN 18 WAS SET AVAILABLE AT 22226 UTC, 14 FEB 90 (DAY 45) 2. RECOMMENDED ACTION: USERS MAY BEGIN PLANNING ACTIVITES WITH PRN18 3. POC: MAJ FAUVER AT COMMERCIAL (719) 550-6379 OR AUTOVON 560- 6379.