Bill Johnson clearly explains what radar is, outlining what it does and doesn\'t do. He describes how to make simple adjustments to get a decent picture, and explores how to use the basic radar. This is followed by greater information on the various confusions and anomalies that the picture can present, progressing to the more complex functionality of a modern digital (raster) set. Finally you learn the key elements to consider when choosing and installing a radar system for your boat.