NOTICE ADVISORY TO NAVSTAR USERS (NANU) #008-93017 SUBJ: PRN11 USABLE 017/0900 1. CONDITION: PRN11 (SVN8) WAS UNUSABLE ON DAY 017 (17 JAN 93) BEGINNING 0300 UTC UNTIL DAY 017 AT 0900 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.