Use Of Compass

USE OF COMPASS TO SEE THE DIRECTIONS

Compass is a very basic instrument to see the direction to align the directional antennas in the required directions .

How to Use Compass ?

All compasses comes with two needle always pointed in opposite directions. One of the needle is mostly red coloured which always points towards the north direction.

By default north is always taken as reference point  it is 0˚ , east is 90˚ south is 180˚ and west is 270˚.

If we say that we have to align the antenna at 70˚ we mean it 70˚ from north unless it is specified .

To see the proper azimuth , look at red needle of the compass , synchronize it with the 0˚ mark in the compass as red needle always points towards the  0˚ which is north , now look at the degrees marked in the compass , if for eg. It is 70˚ make a small straight line in that direction on ground , and look in the direction of this line , it is the direction 70˚ from north.

In point to point communication if the azimuth from 1^st location is  A˚ ( A<180) then azimuth from 2^nd location will be B ( B= A+ 180) . If the azimuth from 1^st location is C˚ (C>180) then azimuth from 2^nd location will be D (D=C-180) .

Eg. 

If Azimuth from 1^st location is 70˚  then the azimuth from the 2^nd location will be ( 180 + 70) = 250˚.

If Azimuth from 1^st location is 200˚ then the azimuth from the 2^nd location will be (200-180)= 20˚.




Compass must be kept away from magnet and heavy iron materials while doing observations.

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