
Selecting Record Track then pressing ENT allows you to
define how your course is saved. Choosing not to save
your track may free the processor up to run other func-
tions a little bit faster; however, you are not likely to no-
tice any difference in performance unless all data ports
are near their full throughput capacity. You also have
three different levels of track saving capability: Normal,
Fine, and Detailed. The software saves each calculated
position coordinate to draw the lines for the plot screen.
There are a finite number of plot points which can be
saved in memory, before the CDU begins overwriting the
first set of plot points. If you are traveling a long distance
at a high rate of speed (say over 10 knots) you probably
will want to use the Normal selection, which only stores a
plot point when your direction changes. If you are doing
some tight maneuvering or station keeping tasks, you
will probably want to use the Detailed selection, which
stores a position every 0.5 meters. The Fine selection
stores a plot point every 7 meters.
The PLOT screen is inactive if an MX antenna is not con-
nected or not detected.
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