02-12-2021, 12:47 PM
(02-12-2021, 07:51 AM)pabrides Wrote:(02-12-2021, 01:19 AM)Fred_B Wrote: Had no idea the magnetic pole moved that much. Speaking of compasses- compasses that are useful in one hemisphere (Northern or Southern) are useless in another....from what I've heard.
Fred
Hi Fred
I guess its just one of those things we have to be aware of.
When I started flying the max variation was about 15 degrees. Looks like these days it's about 5 degrees but increasing. However, if you confuse east and west variation you could double the error.
Keeping track of Variation kinda makes navigation interesting. Coastal piloting would be boring without it, as was the case here in cebu. I'm happy to see my variation change - I get to update my important magnetic bearing fixes.
Do you have any references concerning the north and south compasses?
Cheers
padbrides,
This is just a quick explanation;
https://www.earthlearningidea.com/PDF/197_Compass.pdf
It seems a compass needle that tries to point to the North magnetic pole will have the compass card dip down when it's below the equator.
Carlos