Power search in eight modes for fishing and other sonar applications. The CH-250 is a revolutionary, high-performance searchlight sonar designed for a wide range of commercial fishing vessels. Fish and underwater objects are displayed on a compact color LCD screen. Target echoes are presented in 8 or 16 colors depending on the received echo strengths. The highest echo level is painted in red and next strongest echo in orange, and other colors follow with reducing echo levels. One of the echo strengths can be displayed in white to enhance the specific echo level. The background color may be customized for optimum viewing at day or night. An operating frequency can be selected from 60, 88 or 150 kHz.