NOTICE ADVISORY TO NAVSTAR USERS (NANU) #064-95115 SUBJ: FORECAST OUTAGE PRN23 DAY 115/0400 UTC FOR UP TO 20 HOURS 1. CONDITION: PRN23 (SVN23) IS SCHEDULED TO BE UNUSABLE ON DAY 115 (25 APR 95) BEGINNING 0400 UTC FOR UP TO 20 HOURS DUE TO SOFTWARE TESTING. SCHEDULED TESTING WILL NOT REPOSITION PRN23. 2. AFFECTED AREAS: GLOBAL 3. POC: 1LT ALBERTS AT COMMERCIAL (719)550-6378 OR DSN 560-6378.