The destroyer received upgrades to her sonar system during this repair period.

After the war she became the first ship to be fitted with an experimental sonar system in 1920.

But their sonar system is better than any radar.

When it hit the water the torpedo would start its own hunt with an on-board sonar system.

In the 1960s, he helped solve the mystery concerning poor performance of sonar systems.

The water off the American coast, though nearly isothermal, was not entirely perfect for sonar systems.

The biggest improvement, however, it's in the sonar system.

"These animals have incredibly good sonar systems and can dive deep."

"The next instrument is an advanced sonar system," Boland continued.

In the late 1990s, Dolphin tested a new sonar system.