Two of the submarines are lost while attempting to cut through submarine nets at the entrance to the fiord.

The surviving submarine penetrates the submarine nets in the fiord and places explosives under the German battleship.

HMS E12 became trapped in anti submarine nets in the Dardanelles.

Concurrently, given the entry of the United States into World War I, G-1 tested submarine nets and detector devices for the Experiment Board.

She served as dispatch boat in Philadelphia harbor and guarded submarine nets there.

There remained a chance that the ships could get back into Pearl Harbor before the submarine nets were closed for the night, by running for home at twenty knots.

The ship worked the submarine nets at Tiburon, California, and San Francisco over the next eight months, before departing San Francisco Bay on 29 November 1944.

The dense German and Finnish minefields and the submarine nets effectively restricted Soviet traffic in the Gulf of Finland, forcing the larger vessels to remain at port.

Skipper Bergen sacrificed his life to save the Tempest from destruction when it was caught in an anti submarine net.

Twelve days later, Stanly and her convoy passed through the submarine nets into the harbor at Nouméa, New Caledonia.