NOTICE ADVISORY TO NAVSTAR USERS (NANU) #070-92106 SUBJ: PRN6 UNUSABLE 106/1710-106/1723 1. CONDITION: PRN6 (SVN3) WAS UNUSABLE ON DAY 106 (15 APR 92) BEGINNING 1710 UTC UNTIL DAY 106 AT 1723 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.