Today's high-tech, multipurpose depth sounders and fish finders are designed to produce a range of readings, from bottom contour, fish location, and thermoclines, to a variety of other useful sonar data. However, the technology commonly used to decipher among these different signals, coupled with the configuration of their specialized transducers, greatly reduces their ability to give instant bottom readings while on plane. The HawkEye Digital Depth Sounder (DF1000D) is engineered to give precise depth readings from 3 to 200 ft., at up to 63 mph. Say goodbye to the days of not knowing the depth while running your boat on plane.