On layman's terms field rotation is the virtual rotating movement of the whole sky, due to Earth's rotation. Quoting: emerald_glow
For the naked eye this movement is too slow to notice.
Then I guess you never watched a sunrise or sunset. Diurnal rotation, which is what you just described, can be noticed in short time intervals by naked eye observations with an appropriate fixed reference point. Furthermore, observing the moon by naked eye when it is rising or setting will show a noticeable amount of field rotation from non-polar locations compared to its orientation at the meridian (what would generally be considered the "normal" view by most laymen).
When observing an object with naked eye, we simply follow that tiny movement with turning our head. Quoting: emerald
Which is an altitude-azimuth perspective, and is therefore subject to field rotation. It's the same for all non-polar aligned perspectives, including those of the siderostat and heliostat.
[link to adsabs.harvard.edu
The only difference between that and a naked eye field rotation is that it is the diurnal rotation of the apparent field of the eye, rather than the optical field of an instrument. There is no substantive difference in the outcome, which is a moon showing an apparent rotation which you characterized as a "U - moon" and "laid back" crescent, which as I already showed above, is due to field rotation and is eliminated in a simultaneous polar aligned view.
No matter how I hard try to agree with Mr Astro, I just cannot find any connection... Quoting: emerald
That's Dr. Astro to you. I cannot know for certain whether you're incapable of understanding field rotation, or if you simply refuse to understand it because you would have to admit that there was nothing odd about the apparent orientation of the moon. In any case it doesn't really matter, I'm not trying to convince you, I've already long since written you off. It is entertaining to see your responses though.