
5 ARPA - additional
facilities
5.1 Introduction
With increased processing capability, manufacturers
have been able to provide facilities additional to those
specified in the IMO Performance Standards, some of
which, in particular alerts, mariners had indicated would
be of value.
Further design potential was realized by providing a
facility whereby the ARPA would automatically
deduce reliable values for the vessel's course and speed
over the gound by tracking a designated stationary
target. Such a facility, known as
automatic
ground-stabi-
lization, can provide a reliable input to the ARPA but it is
not the correct input for collision avoidance ...