I think this might be an interesting thread.
Many of you in the Navy, especially those who served in submarines know Nathaniel Bowditch.
Nat Bowditch was a self taught mathematical genius. He lived during the American Revolution and developed a method of determining time on board a ship. The real trick in navigation is not Latitude, it's Longitude. Longitude is not so much where you are but when you are. Nat overcame many shortcomings, including stature, to become not only a ship's officer but a teacher of navigation to various ship's crews. Once he "swallowed the anchor" (retired) he wrote the definitive text of his time about both navigation and generally how to operate a sailing ship. "The American Practical Navigator" was sold to the the Government upon his death and continues to be revised and updated today. There's a copy on the bridge of most every ship afloat today. The young adult "Carry On Mr. Bowditch" volume biography was a text I used whenever I could in my teaching. It's out of print but available on Amazon. Know a young man who is maybe looking for motivation? Here's a book that he'll refer to all his life with the question, "What would Nat Bowditch do?"
Steve