NOTICE ADVISORY TO NAVSTAR USERS (NANU) #004-92013
SUBJ: PRN3 UNUSABLE 013/2100-013/2109
1. CONDITION: PRN3 (SVN11) WAS UNUSABLE ON DAY 013 (13 JAN 91)
BEGINNING 2100 UTC UNTIL DAY 013 AT 2109 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) 550-6379 OR DSN 560-6379.