Complex sentence: In July 1929 he was assigned to duty as flight instructor at the Naval Air Station Pensacola, from July 1929 until June 1932, when he was ordered to the USS "Saratoga", as Landing Signal Officer.
Split into simpler sentences: In July 1929 he was assigned to duty as flight instructor at the Naval Air Station Pensacola, until June 1932. He was then ordered to the USS "Saratoga", as Landing Signal Officer.