As a young officer candidate in the US Navy, I took a navigation class co-taught by a very weathered quartermaster (QMCS) whose love was celestial navigation. W

As a young officer candidate in the US Navy, I took a navigation class co-taught by a very weathered quartermaster (QMCS) whose love was celestial navigation. We spent several days on the subject, and ended with a case study of Shackleton's journey to South Georgia. There's nothing like a fascinating subject taught by an experienced and enthusiastic expert. That was many moons ago.