spit compass

[jf1981]

Originally Posted by ty1

Hi does any know how to set the compass if it works in the spit mk1a or procedure thanks in advance

You have to set keys for magnetic compass & for gyro.

Basically most people use to move the bottom one (magnetic) until indicated north and real north (the yellow T marker) are parallel then read the indicated heading and set gyro at same. Then you would follow the gyro.

For myself, I have an easier & faster trick.

Just keep the magnetic indicator as it is. Read the indication in front of the yellow T marker, and set the gyro to the symmetric value.

For example, if the magnetic compass points to 350, you are heading 10.
If it points to 270 you are heading 90.
If it points to 30 your heading is 330.
If it points to 150 you are heading 210.
0 is 0 and 180 is 180 but for other readings make the symmetry.

Also remember to recalibrate sometimes and always after strong maneouvers as the gyro will deviate. Only the magnetic will remain. And finally, the geographic north has 10 degree difference with magnetic north. So if you read on the map heading 90 you have to head 100 magnetic compass. Just add 10 degree to get the magnetic heading, the only one which you have access to.