They are actually called "planes" on a submarine and allow it to maneuver underwater. Horizontal "planes" allow the submarine to go up/down, vertical "planes" allow the submarine to go left/right.
They need fins because the engine and the fins make a good combo The fins push the water aside while the engine propells the sub forward and that's why i think Fins are nessesary in Subarines.
Well, darling, submarines need fins to help with stability and control underwater. Those fins act like the submarine's rudder, helping it steer smoothly through the depths. So, next time you see a submarine cruising along, just remember it's those fins keeping it on course.
They use motors attacked to their fins to hit about 80mph or man made submarines
During WW2, all the major countries involved used submarines.
They were used by submarines to navigate when not in open waters, They were also used by submarines and anti-submarine ships to locate enemy submarines.
Submarines todaee are used for underwater exploration,funn,new life underwater.
Shallow diving submarines are used for reef watching in many parts of the world.
Nuclear energy is used to power most modern submarines
submarines were used in WW1 and the weapons used were torpedos and a deck gun.
Both the Union and the Confederate had submarines, but the Confederate used them more often.
a goldfish uses his/her fins for direction when it swims.
No, not really, submarines were first used successfully in the Civil War.