Garmin GPS 72 - Manual (Page 9)

7
Introduction
7
Reference
Initializing the GPS Receiver
Before the GPS 72 can be used for navigation, the GPS receiver must be initialized. The
GPS receiver should only need to be initialized the fi rst time the unit is used, or if it has
been stored several months.
The GPS 72 stores orbital data for each satellite in an Almanac. The orbital data is
supplied in the satellite signals. Each time the unit is used, the Almanac is updated. This
is how the GPS 72 knows which satellites to search for. If you do not use your GPS for
several months, or move the unit several hundred miles between uses, the Almanac can
become “cold”, that is to say that the orbital information is no longer valid. If the Almanac
is “cold”, your unit may have trouble locking on to satellite signals. If the unit is unable to
receive 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 sky
can be obtained.
2. Turn the unit on and hold it in front of you with the top of the unit tilted upward. Follow
the 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 fi ve
minutes to acquire enough satellite signals to become operational. When the unit
is able to navigate, it will display either 2D GPS Location or 3D GPS Location in the
Receiver Status Field.
Ready to Navigate
Initializing the GPS Receiver
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