[CA] [CA11] Airmar TM 260

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum ,

Stepped hulls can be a challenge for fishfinding and other sonar equipment. As indicated within the FAQ found here, a transom mounted transducer would not be recommended for stepped hulls. As shown within the photo within the referenced FAQ, an aerated flow of water will be generated aft of the step as the boat's speed increases. Many will elect to install a 50kHz/200kHz in-hull or thru-hull transducer slightly forward of the forward most step. However, if the boat's speed lifts the bow sufficiently high enough to cause the water beneath this additional transducer to be aerated, then it too will lose contact with the bottom.