I helped ferry an open cockpit biplane from Colorado to the Chicago area with more or less basic VFR equipment - compass and maps. (We did have a handheld GPS... which did not seem to stay connected) Eight hours of hand flying was a wild change of pace from the normal equipment we were use to. Started 'chasing' the compass when my co-pilot wanted a course modification... and I had missed our heading while already in turn. Embarrassing. It had been a long time since I actually tried navigating with an actual compass, and had to pay attention to mentally adjusting for compass errors in acceleration and turns.