They can capture huge schools by rapidly encircling them with purse seine nets with the help of fast auxiliary boats and sophisticated sonar, which can track the shape of the shoal.

While the search for sunken wreckage has been aided by sophisticated sonar and robot equipment, the quest for floating debris has been made mainly by squinting human eyes.

As Rines and Wyckoff scour the loch with today's sophisticated sonar, scientists explore the loch's ecosystem and geological history for clues, and the most famous photo of Nessie is put to the test, with surprising results.

Ordinarily, a surfacing submarine is able to detect vessels using its sophisticated sonar, which listen to the sounds of engines and other machinery.

The Ocean Explorer scanned the bottom, using a most sophisticated sidelooking sonar, which produced this picture of the bottom.

To compensate, the fishing industry is removing huge amounts of forage fish from the oceans, using factory ships with sophisticated sonar and spotting planes.

This decision device may be an operator with headphones or a display, or in more sophisticated sonars this function may be carried out by software.

Then they close in using sophisticated sonar to track the shape of the shoal.

With a start, he realized the thing was scanning him . . . inspecting him with its own sophisticated sonar.