Abstract: A depth finder system of the present invention permits detection of the presence of objects within a body of water located below a body of ice. The depth finding system includes a display unit, an electrically conductive cable, and a transducer. The display unit is locatable on the body of ice adjacent a hole in the body of ice while the electrically conductive cable is electrically connected to the display unit. The transducer is capable of transmitting a sonar sensing wave in the shape of a cone through the body of water to detect the present of objects therein. The transducer system can include a positioning means for selectively fixing the conductive cable relative to the positioning means for selectively controlling the length of cable permitted to extend within a body of water below the body of ice.