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Diving plane

The port bow plane of the Soviet-era submarine B-39

Diving planes, also known as hydroplanes, are control surfaces found on a submarine which allow the vessel to pitch its bow and stern up or down to assist in the process of submerging or surfacing the boat, as well as controlling depth when submerged.[1]

  1. ^ Cite error: The named reference Fleet manual, Planes was invoked but never defined (see the help page).