Because it's impossible to navigate properly without one.
A rudder is mounted on the stern of a boat and is used to steer. It can also be found on ships, planes, aircraft, and submarines.
Submarines have a rudder like most surface ships.
The rudder that was on the old plane was very rusty.
One part of a boat is called a rudder.
Small boats use a bar attached to the rudder to steer. Larger boats and ships will use a wheel and rope or chain system to control the rudder.
no, you must use the elevator and rudder to make a proper turn.
Yes
Submarines typically use air tanks. Oxygen is very dangerous and very flammable. It's use is very limited on submarines for that reason.
Submarines only use very few lights: 1. Bow and Stern (rudder) lights - the Bow light is contained withing the jackstaff, and is only used in port while moored or anchored. The Rudder light is used while underway surfaced, along with the Port/Starboard lights.l 2. Port and Starboard Navigation lights - like all vessels, submarines use Port (Red) and Starboard (Green) navigation lights, which are located on the submarine's sail/fairwater. 3. Yellow Flashing Light - Submarines traveling on the surface at night use a raised mast with a flashing yellow beacon. The beacon, along with the other navigation lights, tell other ships that the vessel is a submarine, and which direction it's headed. 4. Security lights - Mounted on the sail in port, they are used as safety/security lights while moored or anchored.
use a rudder
Submarines are steered like any other Naval vessel, using a system of high-pressure hydraulics operated from the Helm by a qualified helmsman. The rudder is also capable of being moved by hydraulic handpump if the main hydraulic pumps are out for some reason (not easily either).
Rudder drop is typically measured by the amount of deflection or displacement of the rudder from its neutral position. This is usually expressed in degrees of rotation or in millimeters of movement. Measurement can be done manually by visual inspection or may be gathered using sensors or instruments connected to the rudder mechanism.