Anglers use sonar technology, too, in the form of a fish finder, which emits ultrasonic pulses into the water and “listens” to the echoes bouncing off objects below. At the heart of a fish ...

Thankfully, gone are the days when an able seaman would manually deploy the sounding line and call out the depth to the bottom. [Neumi]’s sounding rig uses an off-the-shelf sonar depth sounder ...

Captains speculate that fish found deeper than 200 feet are traveling rather than eating. Once a target appears on the screen, the user can lock onto it. The sonar then provides constant updates on ...