Fitted to the array is sophisticated sonar equipment, which, in this incident, was in a collision with the Russian submarine. HMS Northumberland was tracking the underwater vessel at the time of ...

DSV said the blurry image captured by an unmanned underwater submersible at a depth of 16,000 feet (5,000 metres) using side scan sonar “reveals ... around the world. Submarine exploring Titanic ...

It takes two hours for the Bluefin-21 underwater vehicle to reach the seabed to search for remnants of Malaysia Airlines Flight 370. Why do authorities think it's now the best hope for finding the ...