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Why is placement of transducers so important?
For optimum performance, the transducer must be in direct contact with the water at all times. Air bubbles and/or turbulence across the transducer will degrade its ability to transmit and receive signals. Acoustic noise-which is always present-can interfere with the operation of the transducer. While ambient noise cannot be controlled, carefully selecting the transducer mounting location can minimize the effect of vessel-generated noise. The lower the noise level the higher you can set the gain setting.
Ambient noise sources:
waves and air bubbles, fish and mammals, rain and hail, other vessels, and shores.
Vessel-generated noise sources:
aeration and turbulence from water flowing across the hull, propellers, propeller shaft vibration, machinery such as engines, generators, gears, and pumps, as well as interference from other fishfinders.
Where is the best place to place my thru-hull depth transducer?
Choose a location where the water flow 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.
Garmin Transducers
 The Garmin Bronze thru-hull mount long stem transducer with fairing block. Provides depth, temp and speed data. Operating frequency of 200 and 50 kHz. Beamwidth of 12 degrees at 200 kHz, 45 degrees at 50 kHz.
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 The Bronze Depth thru-hull has operating frequency of 200 kHz. Beamwidth of 12 degrees. Transducer kit comes with installation instructions. Follow the instructions carefully so you don't mangle your boat in the process.
Order online.
 Plastic, thru-hull mount transducer with depth. Operating frequency of 200 and 50 kHz. Beamwidth of 12 degrees at 200 kHz, 45 degrees at 50 kHz.
Order online. |
