NOTICE ADVISORY TO NAVSTAR USERS (NANU) #083-91109
SUBJ: PRN12 UNUSABLE DAY 109/2200-109/2214
1. CONDITION: PRN12 (MCS: SVN10) WAS UNUSABLE ON DAY 109 (19 APR 91)
BEGINNING 2200 UTC UNTIL DAY 109 AT 2214 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.