NOTICE ADVISORY TO NAVSTAR USERS (NANU) #092-90128
SUBJ: PRN13 UNUSABLE 128/1509-128/1555
1. CONDITION: PRN13 WAS UNUSABLE ON DAY 128 (08 MAY 90) BEGINNING
1509 UTC UNTIL DAY 128 AT 1555 UTC.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF GPS SATELLITES PRIOR TO
USE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-6379
OR AUTOVON 560-6379.