John F. Kennedy Postings refer to the three positions he held in the United States Navy during World War II. The first position was Ensign of Torpedo Squadron (ETAS), which was responsible for the operation of torpedo bombers. The second position was Assistant Radio Officer of Rescue Squadron (ARRS), which was responsible for rescuing downed airmen. The third position was Executive Officer of Destroyer Squadron (ETDS), which was responsible for the operation of destroyers.