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This error is present in a compass which is damped in tilt. A compass damped in tilt always settles east of the meridian and above the horizon in NH, and vice-versa. Its magnitude depends on the observer's latitude, Sin( error ) α Tan( latitude ) At equator, the error is nil. The error is eastward in all northernly latitudes, and vice-versa. For the purpose of damping error, a latitude rider / adjuster is provided with the gyro compass which shifts the lubber line equal to the amount of error in the appropriate direction.
Elmer Ambrose Sperry was the inventor of the gyro compass and gyroscope.
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.
All the directions on a compass make up the Compass Rose.Cardinal Directions are North, South, East and West. Cardinal in this sense means main or major.The directions halfway between these Cardinal directions are Northeast, Southeast, Southwest and Northwest. These are called Primary InterCardinal directions. Between the Cardinal and Primary InterCardinal directions are the Secondary InterCardinal directions, such as North-Northeast.
Most notably, the gyro compass.
Pelorus
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.
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.