2D Imaging Sonar for gaining a visual in murky or dark water. The M1200 is a 1.2/2.1 MHz Dual Frequency Mode capable Multibeam sonar. The Dual Frequency Mode allows for greater detail in a smaller width. Shorter range capability than other imaging sonars (0.1m to 30m) but offers the highest quality imagery in that short-range, best suited for inspection applications such as hulls of vessels.