COMPASS?INVENTION OF COMPASS

                                                 COMPASS

                                   

                                 

                                                    

  A compass is device used to finding directions on the earth . It is made up of magnetized   pointer it is free to align itself accurately with Earth's magnetic field, which is  great assistance in navigation.It finds the accurate and proper direction of  North South East and West.

A compass can be used in conjunction with chronometer  to provide accurate navigation capability. 

This device is great;improved  at the time of trading by traders making travel safer Easier and more efficient.

An early form of compass was invented in China in 271 C.E and is one of four greatest inventions of ancient China.

 The familiar mariner’s compass was invented in Europe around 1300.
                            What  an Compass needs ?

  It needs a magnetic device using needle to indicatethe direction . It is easy to carry we can carry  in our pockets.

  The simple way of using compass is to know the arrow always  points in the same direction, magnetic North Which is roughly similar to true north. 

Except in areas of extreme magnetic declination variance this is enough  to protect from walking  in a substantially different or even opposite direction  than excepted over-er short distances.

Compass navigation used in conjction with map requires a different compass method.To take map bearing or true to destination with a  protector compass the exact value of the magnetic declination is place- dependent and varies over time, though declination is  frequently given open the map itself or obtainable on-line from various sites. 

Because the Earth's magnetic field varies at different latitudes, compasses ate often  balanced during manufacture.

Most manufacturers balance their compass needles for one of Five zones. Ranging. originally, many compasses were makes only as to the direction of  magnetic north, or to the four cardinal points .

Later, mariner's divided the compass cardinal equally  spaced points divided from the cardinal  points . The 360-degree system later look hold,which is still in use today for civilian navigators.

"Compass  is one of the most valuable and useful invention till now".

Conclusion:-Here You get the information regarding one of the Greates Invention Compass .