NOTICE ADVISORY TO NAVSTAR USERS (NANU) #053-91053 SUBJ: L-BAND-ON SCHEDULE FOR PRN9 1. CONDITION ON DAY 53 (22 FEB 91): PRN9 (MCS: SVN6) USABLE OVER WESTERN NORTH AMERICA (WNA) AND PERSIAN GULF AREA (PGA). L-BAND-ON SEVEN DAY FORECAST: DAY DATE L-BAND-ON WNA L-BAND-ON PGA 53 22 FEB 91 53/0434-53/0634 53/1649-53/1904 54 23 FEB 91 54/0432-54/0632 54/1645-54/1900 55 24 FEB 91 55/0428-55/0628 55/1641-55/1856 56 25 FEB 91 56/0424-56/0624 56/1637-56/1852 57 26 FEB 91 57/0420-57/0620 57/1633-57/1848 58 27 FEB 91 58/0416-58/0616 58/1629-58/1844 59 28 FEB 91 59/0412-59/0612 59/1625-59/1840 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.