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
Based on experience it is wise to select a location as deep as possible for the
transducers, where the water is less aerated and you have a wider weather window.
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 aerated water, less noise and less turbulence.
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 gondolas which protrude from the hull.
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.
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.