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GS ................ Ground Speed - Your actual speed.
TTG .............. Time To Go - Time remaining at your present speed until
you reach a waypoint.
VOLTS .......... Electrical system voltage.
VMG ............. Velocity Made Good - Your ground speed towards a re-
called waypoint, airport, etc.
XTK .............. Cross Track Error - Shows your distance to the side of the
desired course line.