William F. Buckley Jr.'s Celestial Navigation Simplified

《William F. Buckley Jr.'s Celestial Navigation Simplified》線上看，高清完整版. Join this world-renowned personality for the most unique program on celestial ever. Teaches the theory and practice of Celestial Navigation and also teaches the noon shot. Using computer graphics, he illuminates the finer points of GP, GHA, and GMT. Worth twelve weeks of night school.