Patent ID: 7495997

Claim:
A display for fish sonar, comprising: (a) a motor, said motor including a rotary shaft; (b) a shaft position indicator operationally coupled to a controller of the fish sonar; (c) a light conducting pipe fixed to and extending from the rotary shaft of said motor for rotation therewith, said light conducting pipe having a light collection end and a light directing member extending from said collection end to a luminous tip that revolves around the axis of rotation of the rotary shaft; (d) a light source operationally connected to the controller and positioned adjacent the light collection end of said conducting pipe such that when said light source is illuminated, light from said light source is collected by the light collection end, passed along the light directing member and used to illuminate the luminous tip; and (e) a front panel having a scale and a non-opaque portion through which light from the luminous tip can be viewed, wherein when the controller detects an object in the water and determines its range, the controller causes said light source to turn on and off as the luminous tip revolves beneath the front panel such that light from the tip cooperates with the scale to indicate the range of the object.