For that, they said, the defendants considered diesel military submarines in Russia and began negotiations to buy one.

Sometimes there is an intermediate medium, such as the batteries of a diesel submarine.

A diesel submarine is a very good example of a hybrid vehicle.

Both diesel submarines were reported to be on a cold-water training mission.

Russia is also building two 636-type diesel submarines for Algeria.

Sonar quickly identified it as a diesel submarine, Romeo class.

One big problem is logistical: the United States no longer makes diesel submarines.

"But this places limits on the ways our men and women in uniform can meet the threats from diesel submarines."

The diesel submarine was about as inhospitable a place to work as one could imagine.

The submarine was one of the fastest diesel submarines launched.