A. Choose a location where the water is smoothest with a minimum of turbulence and bubbles (especially at high speeds). The transducer needs to be continuously immersed in water and the sounder beam unobstructed by the keel or propeller shaft. Make sure that there is adequate headroom and there is a minimum deadrise angle.

NEVER mount the transducer near water intake or discharge openings or behind strakes, struts, fittings, or hull irregularities. Also, water near the keel can be quite turbulent which will negatively effect performance.