Do you understand how it works?
No idea at all, I have always been able to tell if there is a directional change.
When I was about 5 years old my family and I were headed back to my Moms home in Wisconsin from California; we drove east most of the way but one night I was asleep in the back of the car when we turned north, it woke me up and I asked my Mom why we changed direction.
We were on old highway 66 and it kind of wandered around when we hit the mid west, not being old enough yet to read a map I didn’t realize that cross country roads had a tendency to wander around and follow old wagon trail routs and the routs of least resistance.
My Mom asked me how I knew we were headed north and gave me a funny look, I just told her I could feel it.
I’m in my 70’s now and have been that way my entire life.
When I was in the Marine Corps we had to take an over land navigation course; never could figure out how a supposedly trained officer could screw up an over land course when he had a map, a compass, and pretty straight forward land marks.
I really don’t know how or why it works, I have just learned to trust it.