magnetic compass
A ship's rudder is used to change the direction of the ship. The rudder is typically located at the rear of the ship and is controlled by a steering wheel or a tiller. By turning the rudder, the flow of water is redirected, causing the ship to turn.
A device called a motor capacitor is used to change the rotation direction of a motor in a washing machine. By changing the connection of the capacitor, the motor's direction can be reversed to rotate in the opposite direction.
A device which operates(or function) only in one direction is called unidirectional (or unipolar) device
A device that reverses the direction of electric current is called a switch or a commutator. These devices can change the flow of current by opening or closing a circuit in the opposite direction. Such devices are commonly used in electrical systems to control the direction of current flow.
Sextant
The Compass-
Ships are steered by a device called a rudder, which is operated from the helm.
The Titanic wheel was used to steer the ship and change its direction. It was operated by the helmsman, who followed the captain's orders to navigate the Titanic through the ocean.
marine chronometer.
Sandglass or ampoletta
propeller
The marine chronometer is used to tell time on a ship. It was created in the 18th century and is very precise and accurate.