= Notice Advisory to Navstar Users
{wiki=Notice_Advisory_to_Navstar_Users}
The Notice Advisory to Navstar Users (NANU) is a formal notification issued by the United States government, specifically the U.S. Space Force, regarding the operational status of the Global Positioning System (GPS). NANUs provide information on planned maintenance, satellite outages, or changes in the configuration of the GPS constellation that could affect positioning, navigation, and timing services provided by GPS satellites.
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