sonar

It had advanced sonar—aimed not at the ocean floor but at other subs and shipping—and drew a blank.

They are loaded with state-of-the art sonar and radar equipment.

Or how about powerful sonar blasts the U.S. Navy is using in the waters off southern California?

Before that, in December 2011, it won a $691 million U.S. Navy subcontract for “combat and sonar systems” for submarines.

He was talking about the sonar beacon linked to the black box of Air France Flight 447.

The tyme of hir purificatioun was sonar then the Leviticall law appointes.

The sonar equipment showed what kind of rock it was—iron and basalt.

Diciendo y haciendo, el pcaro sac del bolsillo cuatro piezas de plata y las hizo sonar.

Thus the sonar waves would appear to be striking no obstacle—and no echo would return to the sonarscopes on the search craft!

An invisible sub—one that sonar pulses would seem to pass right through, as if nothing were there!