 Wiltsie remained in "Yorktown" until her loss at the pivotal Battle of Midway from 4 to 6 June 1942.During the early stages of the action, Wiltsie displayed "outstanding professional ability" as he provided complete and accurate navigational information to air plot, thus enabling the carrier's air group to pinpoint their targets.During the Japanese torpedo attacks on 4 June, when "Kates" from the carrier "Hiryū" located "Yorktown" and carried put a successful attack against her, Wiltsie, on instructions from the captain, conned the ship from his battle station in the conning tower and was later deemed directly responsible for the ship's evading a pair of torpedoes.