Garmin GPS 100 - Manual (Page 13)

Normal mode offers continuous position updates as if you were using an
external power source. The GPS 100 will typically operate 8 hours on a
single pack of alkaline batteries, or 5 hours using the rechargeable battery
pack.
Battery Saver mode, suitable for most applications, offers navigation
updates that adapt to your needs while extending battery life. The GPS 100
will typically operate 14 hours on a single pack of alkaline batteries, or 8
hours using the rechargeable battery pack.
QuickFix TM mode offers the convenience of quick, on demand position
updates and extended battery life for surface navigation users. A single pack
of alkaline batteries will last over 100 hours at four fixes per hour. After your
position has been calculated, you may turn the unit off, or it will automatically
turn off two minutes after the last keypress. When you are ready for a new
position fix, simply turn the unit on. The GPS 100 will quickly re-acquire
satellites and calculate a new position. To manually cancel QuickFix
TM
mode, turn the unit off prior to obtaining a position fix. If you have not
requested a new position fix for 30 minutes, the QuickFix
TM mode will
automatically be cancelled.
Simulator mode allows you to simulate the operation of the GPS 100 while
at home or in your office. The simulator mode can be used while learning to
use your GPS 100 and is ideal for planning routes and entering waypoints.
Keep in mind that the GPS 100 is not tracking satellites in the simulator mode.
You should never attempt to use the simulator mode for actual navigation.
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