Echo sounder transducer installation

Main considerations

There are two major considerations to be aware of when fitting acoustic transducers to hulls.

• Acoustic noise: Acoustic noise will mix with the received signal and may reduce the effective range of the echo sounder.
• Aerated water: If aerated water (water with air bubbles, typically from the water surface layer) flows under the transducer, it will easily block the signal, and can lead to more or less corruption of the acoustic pings.

Rules for fitting an echo sounder transducer

Transducer depth

Based on experience it is wise to select a location as deep as possible for the transducers, where the water is less aerated a

nd you have a wider weather window.

Transducer location

Select a location as far away as possible from sources of noise. Normally the propeller is the dominating noise source. Prefer locations in the forward half of the vessel, which normally will provide less aera

ted water, less noise and less turbulence.

Bulbuous bow

If the vessel has a pronounced bulbuous bow, be aware that it will transport aerated water down. Tunnel thrusters in the bow will also transport aerated water down in heavy seas. Accordingly, flush installations are more easily troubled by aerated water than blisters and gond

olas which protrude from the hull.

Portable mounting

For portable mounting, be aware of the need for a stiff connection between echo sounder transducer and motion sensor. Also, be aware of limitations in vessel speed as well as weather window.

Quality data

Provided that these guidelines and the installation manual for the system are followed, the system will function fine and produce high quality data over a wide weather window. On request we will assist with you with further advice.