The high-resolution 12" color CRT continuously presents speed and direction of current at three selected depth layers simultaneously as well as ship's speed and course-made-good in alphanumerics and vectors.
Ultrasonic pulses are emitted in narrow beams in three directions separated 120 degrees from each other and tilted 75 degrees from horizontal. This configuration eliminates the effect of rolling and pitching.
Speed of the ocean current is obtained as the difference between the ship's through-the-water and over-the-ground speeds calculated by using the Doppler effect. Bottom echoes are presented in the Echo Level Display
based upon the returned echo strengths. When the bottom echoes are lost due to aeration/obstacles or fish schools, you can manually select the required depth range in the Echo Level Display. In the Auto Track Mode, the depth range
is automatically compensated by using the depth data from an external echo sounder. In the Nav Mode, speed data from an external GPS navigator is used as the ship's over-the-ground speed for continuous measurement of current speed.