Have been reading these posts with some interest. Many years ago, more than I care to state, I took a USPS intro course. It was ok. The material and curriculum was fine, however, I found the instructors to be condescending and at times pedantic. Now that said, I''m sure that was an anomaly.
Currently, and with no relevance to my experience with the USPS, I am in the Coast Guard Auxiliary. The courses there are excellent but the same bureaucratic resistance to change exists. Nonetheless, the courses the CGAUX has relies heavily on dead reckoning and keeping updated plots, in fact their recommendation is to record DR plots every 30 minutes.
Guess I don''t have anything really important to impart just passing on my thoughts.