NOTICE ADVISORY TO NAVSTAR USERS (NANU) #007-93017 SUBJ: PRN11 UNUSABLE 017/0300-UNTIL FURTHER NOTICE. 1. CONDITION: PRN11 (SVN8) WAS UNUSABLE ON DAY 017 (17 JAN 93) BEGINNING 0300 UTC UNTIL FURTHER NOTICE. 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.