Eagle Electronics 640C, 640cDF manual

Speed is the velocity you are making over the ground. If you want, you can customize the Speed data box to display Closing Speed instead. Closing Speed is also known as velocity made good. It is the speed you are making toward the waypoint. For instructions, see the Customize Page Displays entry in Sec. 8.

Track is the heading or the current direction you are traveling. Bearing is the line-of-sight direction from your present position to the destina- tion. No matter what direction you are steering, the Bearing window shows the compass direction straight to the destination from your cur- rent location. Distance shows how far it is to your destination.

The Off Course window shows the current cross track error. This shows the distance you are off-course to the side of the desired course line. The course line is an imaginary line drawn from your position when you started navigating to the destination. The course line is shown on the Navigation screen and Map Page screens as a red line.

Heading arrow

Red course line

Magenta trail line

Navigation information displays

in data boxes

Bearing arrow

Cross track error range (off course indicator)

Destination name

Navigation Page, going to a waypoint while creating a new trail.

The cross track error range is shown on the compass rose as a white, corridor flanking the course line. The outer edges of this white corridor represent lines that show the current cross track error range. The de- fault for the cross track error range is 0.20 miles.

If the present position symbol touches the right cross track error line, then you are 0.20 miles to the right of the desired course. You need to steer left to return to the desired course. You can use the ZIN or ZOUT keys to change the cross track error range.

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