In general, the most important factor is to avoid air bubbles in front of the transducer face. For this reason, the recommended transducer location is normally in the fore part of the hull, well ahead of the noise created by the bow wave.
The maximum distance from the bow is normally equal to one third of the total water line length of the hull.
If the vessel hull has a bulbous bow, this may well be a good transducer location, but also in this case the flow pattern of the aerated water must be taken into consideration. The foremost part of the bulb is often a good location.
This applies to the vessel in normal trim and speed.
ImportantThe transducer must never be tilted backwards when the vessel is moving at normal speed.
Do not place a transducer in the vicinity of protruding objects, and especially not close behind them.
Make sure that the surface of the resulting installation is as smooth and streamlined as possible.