Installation with more than one hull unit
You may need to install the SU90 hull unit aft of an existing hull unit. If these hull units are placed one after the other along the keel, you must make sure that you have sufficient distance between them.
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A Outer diameter of installation trunk
B When mounted in the longitudinal direction of the hull, the distance between two installation trunks must be minimum three -3- times the diameter of the forward trunk.
(This is a generic illustration. Any similarities with specific products are accidental.)
Note
When mounted in the longitudinal direction of the hull, the distance between two installation trunks must be minimum three -3- times the diameter of the forward trunk. This is important to increase performance and to reduce noise and excessive vibrations that can damage the hull unit.
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On some vessels the sonar hull units are installed side by side.
A Hull unit with transducer (High frequency)
B Hull unit with transducer (Low frequency)
C When mounted perpendicular to the longitudinal direction on the hull, the installation trunks must be placed minimum 1 metre apart.
D Echo sounder transducers
The hull units must not be installed too close to each other. This is important to reduce flow noise when both sonars are used. It is also important to allow unlimited hoisting and lowering operations, as well as necessary access for repair and maintenance.
Note
When mounted perpendicular to the longitudinal direction on the hull, the installation trunks must be placed minimum 1 metre apart.