NOTICE ADVISORY TO NAVSTAR USERS (NANU) #016-91016
SUBJ: PRN23 UNUSABLE 16/2042-16/2234 UTC
1. CONDITION: PRN23 (MCS: SVN23) WAS UNUSABLE ON DAY 16 (16 JAN 91)
BEGINNING 2042 UTC UNTIL DAY 16 AT 2234 UTC.
2. RECOMMENDATION: CONFIRM AVAILABILITY OF SATELLITES PRIOR TO USE.
3. POINT OF CONTACT: MAJ WILLIAM FAUVER AT COMMERCIAL (719)550-6379
OR AUTOVON 560-6379.