Navigation Control - Displays the Navigation Control, the the Navigation Control help for details.
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Cancel Navigation - Cancels the navigation and turns off all visable navigation features and resets all parameters.
View Waypoint Proximity Zones - Proximity zones can be set around waypoints at any specified distance. If you enter this zone an alarm will sound. If you have set proximity zones this option will show or hide them. The proximity zones are displayed around waypoints as red circles with a blue diagonal hatch.
Note : While the proximity waypoints are similar to those found in Garmin GPS receivers it is not possible at this stage to upload these to the Garmin.