A transom mounted transducer for a sonar indicator or depth sounder is probably the most popular because it does not require cutting a hole in the boat’s hull, something many owners are reluctant to do since it could affect a future sale of the boat. The transom mount is efficient when properly installed, but it may not work quite as well at high cruising speeds as a through-hull mounted transducer. The procedure for installing the through-hull and inside-hull mounted transducers are outlined in Data Sheets, 7747 and 7752.
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