Furuno, with a strong commercial marine legacy, continues to fine-tune the efficiency of its radars. The meat and potatoes of differentiating a target happens on the analog side, says Bill Haynes, deep-sea product manager. "HD and digital are marketing terms - with an LCD, anytime you render a target, it is digital radar," he says. The real science happens on the microwave front-end assembly receiver. "We still send out a signal, it bounces back, and we listen to the signature," he says. "But the front-ends dig deeper now than they used to when they listen to the return."