Magellan GPS PROMARK X, User Manual

Page: 180 / 188

Appendix ProMARK X
A-52
CLOSE The message displayed when
navigating on a route, indicating
that you are within 500 feet of the
destination of the current leg.
COG Course over ground.
COURSELINE The planned line of travel; the line
between your start point and
destination.
COURSE OVER GROUND The true direction of travel achieved,
which may differ from courseline.
Sometimes referred to as ground
course.
CROSS TRACK ERROR The perpendicular distance between
the present position and the
courseline. Given as right or
left of course when facing the
destination. Displayed in NAV as
XTE.
DEFAULT The value or setting automatically
chosen by the unit unless directed
otherwise. Can be changed in SETUP
and certain auxiliary functions.
DIFFERENTIAL A method of removing a known GPS
system error from an averaged
position. Can be done in the field,
but has greater accuracy when done
in post-processing.
EPHEMERIS DATA Data on the precise location of a
satellite. Collected by the unit in the
first few second of data acquistion,
and retained for two hours.
COG
Start
Destination
XTE
(Right)