Complex sentence: William L. Polhemous, the navigator on Ann Pellegreno's 1967 flight which followed Earhart and Noonan's original flight path, studied navigational tables for July 2,1937, and thought Noonan may have miscalculated the "single line approach" intended to "hit" Howland.
Split into simpler sentences: William L. Polhemous was the navigator on Ann Pellegreno's 1967 flight which followed Earhart and Noonan's original flight path. He studied navigational tables for July 2,1937 and thought that Noonan might have miscalculated the "single line approach" intended to "hit" Howland.