January 2016
Beginner to intermediate
430 pages
22h 38m
English
Content preview from Radar and ARPA Manual
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ARPA - ACCURACY AND ERRORS
377
vector will also flunctuate. This disadvantage has to be
set against the advantage gained in being able to main-
tain a stable relative vector when the observing vessel is
manoeuvring (see Section 9.6.2).
An erratic course input would have a similarly dis-
ruptive effect. However, such a condition would also
affect the digitization of bearings. This would tend to
cause targets to jump and it would be fairly obvious to
even a casual observer that something was wrong.
Correct relative
motion of
target
True vector correctly
indicates target's
true motion
Relative vector
correctly indicates
target's relative
motion ...
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