A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Frank Reed
Date: 2016 Apr 27, 07:53 -0700
Here's a very nice article by science author Trudy E. Bell on the small-scale motions of the pole: http://tbp.org/pubs/Features/Sp16Bell.pdf (sample attached below). These phenomena are all much too small to affect traditional celestial navigation, but high-precision positional astronomy that tries to determine an observer's position with GPS accuracy does have to worry about these small details.
Clockwork Mapping / ReedNavigation.com
Conanicut Island USA
PS: My position today: 45.204° N, 123.145° W