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Radar and ARPA Manual
book

Radar and ARPA Manual

by A. G. Bole, W. O. Dineley
January 2016
Beginner to intermediate
430 pages
22h 38m
English
Newnes
Content preview from Radar and ARPA Manual
APRA-ADDITIONAL FACILITIES
219
5.2.3 Anchor watch
This facility attempts to offer automatic warning of the
observing vessel or other vessels dragging in an anchor-
age.
If
a
known stationary target (for example, a small
isolated navigation mark) is acquired and designated as
such then an alarm will be activated if the designated
target moves more than a preset distance from the
marked position. If the stationary target appears to
move, then it must be due to the observing vessel drag-
ging her anchor. Alternatively, it will give a warning if
another 'tracked' vessel in the anchorage drags her
anchor; it will, of course, be activated if such a ...
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Publisher Resources

ISBN: 9781483102221