NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2025087 SUBJ: SVN64 (PRN30) FORECAST OUTAGE SUMMARY JDAY 350/1927 - JDAY 351/0149 1. NANU TYPE: FCSTSUMM NANU NUMBER: 2025087 NANU DTG: 170208Z DEC 2025 REFERENCE NANU: 2025081 REF NANU DTG: 121714Z DEC 2025 SVN: 64 PRN: 30 START JDAY: 350 START TIME ZULU: 1927 START CALENDAR DATE: 16 DEC 2025 STOP JDAY: 351 STOP TIME ZULU: 0149 STOP CALENDAR DATE: 17 DEC 2025 2. CONDITION: GPS SATELLITE SVN64 (PRN30) WAS UNUSABLE ON JDAY 350 (16 DEC 2025) BEGINNING 1927 ZULU UNTIL JDAY 351 (17 DEC 2025) ENDING 0149 ZULU. 3. POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV MILITARY - GPS WARFIGHTER COLLABORATION CELL at HTTPS://GWCC-WS.CCE.AF.MIL/GPSOC, DSN 560-2541, COMM 719-567-2541, gpsoperationscenter@us.af.mil, HTTPS://GWCC-WS.CCE.AF.MIL MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN 276-3526. COMM 805-606-3526. JSPOCCOMBATOPS@US.AF.MIL