Noise sources
The operational performance of the CS90 Fish Finding Sonar depends on the noise conditions. It is essential that the noise signature is as low as possible.
The vessel’s hull, rudder(s) and propeller(s) must be thoroughly inspected in dry dock prior to installation.
Roughness below the water-line deformities in the shell plating and protruding obstacles can create underwater noise. These sources of turbulence must be smoothed or removed as best as possible.
Note
It is especially important that the propeller(s) are not pitted or damaged.