It's features include: 1000 or 600 watt available output power depending on choice of transducer - HD Digital Auto Adaptive Transmitter Receiver with infinite receiver bandwidth settings and digital filter - A-Scope (Real Time Display): Split second real time representation of fish and bottom features passing through the beam of your transducer right now, the history of your A-Scope is represented in the standard sounder image scrolling across your screen - Zoom Display: Auto or manual zoom magnification of any part of the 200 or 50 khz  fishfinder screen image, (X2, X4, or X6 magnification) - Bottom Lock: The bottom lock feature shows the bottom as a straight line, in order to help you detect fish close to the bottom and remove wave action from the fishfinder image - White line feature helps distinquish between fish and the bottom, when fish are swimming close to the bottom.

For more information on the DSM300, visit Raymarine's website at: http://www.raymarine.com