Re: Confused on fish finder
To help you with your selection of products, you need to understand the two different ways speed is measured: (1) speed over ground ("SOG") for which a GPS equipped unit is required, and (2) through the water speed ("T/W"or "SPEED") for which a "paddlewheel" transducer is required. If you do not really need or want charting, GPS location, and SOG capabilities, then you may focus on a simple dedicated "fishfinder" with a tri-ducer. The tri-ducer, as its name implies, provides three types of data: your through the water speed by virtue of its paddlewheel, water temperature, and depth readings. It may actually be easier to find products that combine everything, which is what most people desire. Thus, with a GPS chartplotter/fishfinder (with tri-ducer) combo unit, you get the whole enchilada.