ABSTRACTCaptain P. V. H. Weems was a graduate of the U.S. Naval Academy in the class of 1912 and cofounder of our Institute of Navigation. After his first retirement in the early 1930s, Weems continued his efforts in his own small business, called “The Weems System of Navigation.” Because of this, many pilots knew him best for the Weems Plotter, the E6B Computer, his textbooks on both marine and air navigation, and other piloting and dead reckoning instruments. His principal interest and thrust, however, was always the improvement of celestial navigation. The persistent devotion of Capt. Weems to the problem produced outstanding results. The Star Altitude Curves were his proudest achievement and were adopted by the Army Air Corps just prior to World War II. Weems' love of people and the force of his personality, together with his refusal ever to accept the answer “no,” gave us this Grand Old Man of Nav