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Appendix
CLOSE
COG
COURSELINE
COURSE OVER GROUND
CROSS TRACK ERROR
Start
XTE
(Right)
DEFAULT
DIFFERENTIAL
EPHEMERIS DATA
A-52
Destination
COG
The message displayed when
navigating on a route, indicating
that you are within 500 feet of the
destination of the current leg.
Course over ground.
The planned line of travel; the line
between your start point and
destination.
The true direction of travel achieved,
which may differ from courseline.
Sometimes referred to as ground
course.
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.
The value or setting automatically
chosen by the unit unless directed
otherwise. Can be changed in SETUP
and certain auxiliary functions.
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.
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.
ProMARK X
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