The Tacktick Wireless Depth and SOG system (T102) comes in a boxed set which includes, T111 Dual Digital Display T122 Wireless NMEA Interface T914 Active Depth Transducer
Designed specifically to avoid making holes in the hull. The Active Depth Transducer can be fitted in hull while speed (SOG) is provided by any brand of GPS linked to the Wireless NMEA Interface.