NOTICE ADVISORY TO NAVSTAR USERS (NANU) #037-92070 SUBJ: PRN11 UNUSABLE 070/1904-070/1935 1. CONDITION: PRN11 (SVN08) WAS UNUSABLE ON DAY 070 (10 MAR 92) BEGINNING 1904 UTC UNTIL DAY 070 AT 1935 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 WINGATE AT (719) 550-6380 OR DSN 560-6380.