Eagle Electronics 12 manual Cancel Navigation, System Setup, Track Holding

CANCEL NAVIGATION

The AccuMap 12 continues to navigate to a re- called waypoint, the last waypoint in a route, or the cursor position until you stop it.

To stop the navigation function, press the MENU key, then press the up or down arrow keys until the “Cancel Navigation” label is highlighted. Press the right arrow key. The unit stops showing navigation information to the waypoint.

SYSTEM SETUP

The AccuMap 12 has several menus and com- mands listed under the “System Setup” label on the main menu. To use these, press the MENU key, then press the up or down arrow keys until the black box is on the “System Setup” label. Press the right arrow key. The screen shown at right appears.

TRACK HOLDING

Your AccuMap 12 has a special feature called "Track Holding" that pre- vents the unit from showing random numbers on the navigation screens when you're travelling less than 3 miles per hour. These random numbers are mostly caused by S/A (Selective Availability). S/A is random errors introduced into the GPS satellite network by the government to degrade the system's accuracy to the general public. The error can be as bad as 100 meters and 5 m.p.h., which is within the government's GPS specifi- cations. You can see this happening when you're standing still with the track holding feature turned off. With it turned off, your present position will move on the map even though you’re standing still.

The track holding feature works by locking the track at the last known direction when you slow below three miles per hour. Above three miles per hour, the track holding feature is disabled. This feature is automati- cally activated when the unit is turned on for the first time or after you preset it.

You'll see the unit's track "lockup" when you slow below 3 miles per hour. If you have the unit in the "track-up" mode, the map will also lock in the

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