Garmin Adapter Cable To Connect GT30 T M to P729 P79 [010 12234 07] Communication VHF Fixed Mount Ideal for using your Kuuma Building Width, Height & Length:42’W x 17'3"H x 60’L Ideal for using your Kuuma grill aboard your boat by mounting it on any cockpit rail 4W while hosting a transducer Connect a Garmin GT30 transom mount scanning transducer and an Airmar P72 or P79 in hull mount traditional transducer to a compatible echoMAP™ chartplotter sonar combo This adapter cable allows the echoMAP to continue to display water depth from the in hull transducer in instances when the transom mount transducer loses depth reading due to cavitation