A new kind of sonar maps entire underwater landscapes, along with the fish swimming over them, according to the journal Science. Scientists say the new device could be a breakthrough — or spur a new ...

Derelict crab pots. Submerged dredge pipes. Oyster reefs. Every experienced water user knows these obstacles lurk beneath the water’s surface, but without side-imaging sonar equipment to cut through ...

Before you can catch a fish, you have to find it! The first accessory most anglers add to their fishing kayak is a fish finder . At the very least, a simple sonar displays water depth. At the other ...