Elmer Ambrose Sperry was the inventor of the gyro compass and gyroscope.
Pelorus
For synchronising the magnetic and gyro compass elements For synchronising the magnetic and gyro compass elements
Rather than type a long answer - see the related link from Wikipedia for their entry on a gyro-compass.
Most notably, the gyro compass.
its getting to ship , wiring of the line of tube
There are 60 minutes in 1 degree.
The term Gyro refers to any Gyroscope (Space,Earth,Tied or Rate) whereas Directional Gyro is typically a Tied Gyro which is used in Aircraft for the purpose of Heading reference in DGI (Directional Gyro indicator) because it does not suffer any errors like magnetic compass.
Apps can use the compass to determine the phone's current direction. This is useful for maps applications, GPS, or anything else that might need to know the current direction.
A magnetic compass uses the poles of our planet to stay in alignment. A Gyroscopic compass is set to a particular direction and tends to try to stay that way. After time, even the best Gyro will start to precess (move). This means the you will need to compare your Gyro to the magnetic every 15 minutes or so. Some modern gyroscopic compasses are capable of auto resetting to do this update automatically
a navigational compass, under the control of a gyroscope, that automatically indicates true north.
It uses a magnetic needle to point to the earth's magnetic North Pole. The only other type of compass used is a gyro-compass. This uses a wheel which rotates parallel with the earth's rotation.