IntroductionReferenceInitializing the GPS ReceiverBefore the GPS 72 can be used for navigation, the GPS receiver must be initialized. TheGPS receiver should only need to be initialized the first time the unit is used, or if it hasbeen stored several months.The GPS 72 stores orbital data for each satellite in an Almanac. The orbital data issupplied in the satellite signals. Each time the unit is used, the Almanac is updated. Thisis how the GPS 72 knows which satellites to search for. If you do not use your GPS forseveral months, or move the unit several hundred miles between uses, the Almanac canbecome “cold”, that is to say that the orbital information is no longer valid. If the Almanacis “cold”, your unit may have trouble locking on to satellite signals. If the unit is unable toreceive enough satellite signals to determine its location, it will display an options menu.Initializing the GPS Receiver:1. With fresh batteries installed, take the unit outside where a clear 360° view of the skycan be obtained.2. Turn the unit on and hold it in front of you with the top of the unit tilted upward. Followthe screen prompts, pressing PAGE to display the GPS Information Page.3. The initialization process is automatic. It should take the GPS 72 no longer than fiveminutes to acquire enough satellite signals to become operational. When the unitis able to navigate, it will display either 2D GPS Location or 3D GPS Location in the Ready to NavigateInitializing the GPS Receiver