NOTICE ADVISORY TO NAVSTAR USERS (NANU) 2011101 NANU TYPE: GENERAL
*** GENERAL MESSAGE TO ALL GPS USERS ***
On 15 DEC 2011, after 2200z, GPS will transition SVN27 (PRN27) into the broadcast almanac for all satellites.  The almanac transition, one satellite at a time, will require approximately 24 hours to complete.  Before, during and after transition SVN27 (PRN27) will remain unusable until further notice.  Future NANUs will notify users of any changes to the above stated status.
*** GENERAL MESSAGE TO ALL GPS USERS ***

   POC: CIVILIAN - NAVCEN AT 703-313-5900, HTTPS://WWW.NAVCEN.USCG.GOV
   MILITARY - GPS OPERATIONS CENTER at HTTP://GPS.AFSPC.AF.MIL/GPSOC, DSN 560-2541,
   COMM 719-567-2541, gps_support@schriever.af.mil, HTTPS://GPS.AFSPC.AF.MIL 
   MILITARY ALTERNATE - JOINT SPACE OPERATIONS CENTER, DSN    276-3514, 
   COMM 805-606-3514, JSPOCCOMBATOPS@VANDENBERG.AF.MIL