He'd established contact with and tracked an American Ohio-class fleet ballistic-missile submarine.

Astute is the lead ship of her class of nuclear-powered fleet submarines.

Five Trafalgar-class nuclear-powered fleet submarines remain in commission.

Upon her arrival on the 11th, the destroyer escort was assigned to training exercises with fleet submarines.

The huge advancement in American technology required to fill that role with "a new all-purpose fleet submarine" also became apparent.

After the fiasco of submarine design experienced in the late 1920s, Navy designers finally produced plans for a practical fleet submarine.

He also successfully badgered Washington for reinforcements in the way of patrol planes and fleet submarines.

Many of the exhibits focus on the fleet submarines that helped to win World War II.

Due to machinery damage and the limited refit facilities then available for nuclear fleet submarines, Dreadnought was withdrawn from service in 1980.

After almost a month in port at Brisbane, the fleet submarine stood out on her fourth war patrol.