NOTICE ADVISORY TO NAVSTAR USERS (NANU) #076-91100
SUBJ: PRN13 UNUSABLE DAY 100/0000-100/0030
1. CONDITION: PRN13 (MCS: SVN9) WAS UNUSABLE ON DAY 100 (10 APR 91)
BEGINNING 0000 UTC UNTIL DAY 100 AT 0030 UTC.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJOR FAUVER AT COMMERCIAL (719)550-6379
OR DSN: 560-6379.