can use one or two hydrophones pointing towards the aft of the vessel,
but pay attention to the noise generated by the propellers.
hull mounted hydrophone for trawling operations has a 50 degrees horizontal
beam and a 30 degrees vertical beam to provide the catch monitoring
system with optimal reception from the sensors on a bottom or pelagic
This specific beam pattern is especially suited for trawling
and the wide coverage area reduces the need for careful alignment.
Copyright Kongsberg Maritime AS 2007