NOTICE ADVISORY TO NAVSTAR USERS (NANU) #096-91140
SUBJ: PRN6 UNUSABLE DAY 140/0400-140/0413 UTC
1. CONDITION: PRN6 (MCS: SVN3) WAS UNUSABLE ON DAY 140 (20 MAY 91)
BEGINNING 0400 UTC UNTIL DAY 140 AT 0413 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.