The construction of underwater vessels constitutes 70% of the total production volume of the shipyard.

An unmanned Japanese underwater vessel reached the floor of the deepest part of the world's oceans today and discovered fish living there, researchers said.

Empedocles recalled the armless, legless child he had come across during early explorations of the underwater vessel.

He knew that the only way to gain more information-to learn the entire story-would be to get aboard Sappho's underwater vessel.

About 150 have been constructed there since 1896, when the United States Navy built the first underwater vessel.

Yes, according to her commander, Captain Leigh Hunt, he was attacked by a man-made underwater vessel that resembled a whale.

Nuclear power revolutionized the submarine, finally making it a true "underwater" vessel, rather than a "submersible" craft, which could only stay underwater for limited periods.

These became America's first fleet of underwater naval vessels.

Holland was fascinated by the sea, and in particular with models of underwater vessels.

All the large surface craft and all the underwater vessels belonged to Administration, though they were made available to the lab for official business.