Retractable Through Hull Active Depth Transducer. This Sensor allows simple connection to the T122 Wirless NMEA Interface for use in systems whre boat speed is available from a GPS. Operates at 235kHz. 

Features:
2" diameter (51mm)
Max. Hull thickness 2.125" (55mm)
Removeable for cleaning
Easy connection to T122 interface
Right angle cable exit