Kongsberg Simrad TV80, Reference Manual

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Hydrophone
A hydrophone is a vital part of a catch monitoring system. The hydrophone receives the
acoustic communications from the catch sensors and converts these to electrical signals.
Two hull mounted hydrophones are available, one for purse seining operations, and one
for trawl operations. You can install both, and then select active hydrophone by means of
a selector box on the bulkhead. You can also select the active hydrophones by means
of dedicated dialog boxes in the TV80.
Purse seine hydrophone
The hull mounted hydrophone for purse seining operations has a 90 degrees
horizontal beam and a 30 degrees vertical beam to provide the system with optimal
reception from the sensors on a purse seine.
This specific beam pattern is especially suited for purse seining.
Trawl hydrophone
The hull mounted hydrophone for trawl operations has a 50 degrees horizontal
beam and a 30 degrees vertical beam to provide the system with optimal reception
from the sensors on a bottom or pelagic trawl.
This specific beam pattern is especially suited for trawling.
Portable hydrophone
A portable hydrophone is also available. It is designed as a temporary solution
until a fixed hydrophone can be installed at the vessel’s next planned dry docking.
It has an omnidirectional beam and a 50 meter integrated cable.
The cable is supplied on a reel for convenient retrieval and stowage, and is
equipped with a plug for easy attachment to the Sensor Receiver. The cable is
sheathed in polyurethane providing robust external protection to compliment its
150 kg tensile strength.
Related topics
Main system units, page 20
System diagram, page 18
Hydrophone Interface and Splitter
In order to supply more than one sensor receiver with the sensors signals received
through the trawl hydrophone a Hydrophone Interface and Splitter unit must be used.
Use the Hydrophone Interface and Splitter to split the information from a single
hydrophone to two identical outputs.
Related topics
Main system units, page 20
System diagram, page 18
Introduction