Fish finders, depth sounders, sonars: It doesn’t matter what you call them, they’ve come a long way from the original paper graph of the seventies. They still perform the same function, however: to help you locate fish and see beyond the surface of the water. Without them, we’d still be in the dark ages.
But how does all of this work?
In simple terms, a signal is transmitted down through the water via a transducer and when that sound wave hits an object that has more density than the surrounding water (like a fish, fallen tree, weed bed, and, of course, bottom), it bounces back, gets processed and is displayed as an image on the unit’s screen. Throughout the years this image has gotten clearer and clearer.
Today, with the advent of breakthrough features like CHIRP technology, DownVu, SideVu, HD-ID and so on, recognizing fish and fish-holding structure is a breeze. Detailed bottom contours, suspended fish and even thermoclines are that much more accurate, detailed and distinguishable.
But do you really need to know how all this modern technology works? Not really. You can just rest assured that every bit of CHIRP, HD-ID, DownVu and SideVu will help you put fish in the boat.
The question shouldn’t be, “Do I need a fish finder to become a better angler?” The question should be, “Since I already have one on the console, shouldn’t I be putting another one on the bow?”