NOTICE ADVISORY TO NAVSTAR USERS (NANU) #096-92130 SUBJ: PRN12 UNUSABLE 130/2201-130/2214 1. CONDITION: PRN12 (SVN10) WAS UNUSABLE ON DAY 130 (9 MAY 92) BEGINNING 2201 UTC UNTIL DAY 130 AT 2214 UTC. 2. USERS OF GPS ARE CAUTIONED THAT THE SYSTEM IS NOT YET FULLY OPERATIONAL. SIGNAL AVAILABILITY AND ACCURACY ARE SUBJECT TO CHANGE DUE TO AN INCOMPLETE CONSTELLATION AND OPERATIONAL TEST ACTIVITIES. 3. POC: 1LT SKINNER AT COMMERCIAL (719) 550-6378 OR DSN 560-6378.