The marine chronometer is used to tell time on a ship. It was created in the 18th century and is very precise and accurate.
The clock has been used to tell time on ships for centuries.
marine chronometer.
Sandglass or ampoletta
The device is called a marine chronometer.
Sextant
They used the suns positions to tell the time. They used a device called a Sundail. For more information GOOGLE IT!!!!
Ships are steered by a device called a rudder, which is operated from the helm.
propeller
first tell us, what device.
a sundial is a device that was used to tell time a long time ago. here is a vid that will tell you all about them: http://www.youtube.com/watch?v=tI0GqYJha1Q
The device is called a windlass.
magnetic compass