Ault served briefly as an enlisted manin the Navy before entering the Naval Academy as a midshipman. Graduating on 2 June 1922, Ault served at sea on the battleship before reporting to the Naval Air Station Pensacola, Florida, on 23 August 1924 for flight instruction. After earning his wings, Ault served with Aircraft Squadrons, Scouting Fleet, before commencing a tour in the aviation unit of the light cruiser on 10 September 1925. Detached from that ship just over a year later, he served at the Naval Academy as an instructor before reporting for duty with Observation Squadron 3, Aircraft Squadrons, Scouting Fleet, on 15 June 1927. Further duty at the Naval Academy, as an instructor in the Department of Ordnance and Gunnery, followed before he flew with Patrol Squadron 10-S, Scouting Fleet, based in aircraft tender. He then served on the staff of Capt. George W. Steele, Commander, Aircraft, Scouting Force, from June 1931 to June 1932 and alternated tours of duty afloat and ashore: in Torpedo Squadron 1-S, based on board ; at NAS Norfolk, Virginia; and in the observation unit of the battleship. Ault—by this time a lieutenant—next assisted in fitting-out, thus becoming a "plank owner" of that ship when she went into commission in the autumn of 1937. He then served on Yorktown's sister ship,, commanding VT-6. On 5 August 1939, less than a month before the start of World War II in Poland, Ault assumed command of the Naval Reserve Aviation Base, Kansas City, Kansas, a billet in which he served into 1941. On 22 July 1941, Lieutenant Commander Ault once more reported to Lexington, and, the following day, became her air group commander. He was serving in that capacity when the Japanese attack on Pearl Harbor on 7 December 1941 drew the United States into World War II.
World War II
Ault helped to plan and execute the attacks on Japanese shipping at Lae and Salamaua, New Guinea, in March 1942. On the day before the strike, 9 March, Ault and a wingman flew to Port Moresby, where the group commander learned of the existence of a key mountain pass through the forbidding Owen Stanleys, information that, in the words of the task force commander, contributed "a great deal toward success" of the attacks that ensued. On the day of the raid, 10 March, Ault, given the authority to carry out or abort the attack on the basis of what weather he found, flew unaccompanied to the pass and orbited. Finding favorable weather, he transmitted information to that effect and directed the passage of planes from Lexington and Yorktown toward Lae and Salamaua. Those groups sank three transports, put a fourth transport out of action, and caused varying degrees of damage to a light cruiser, a minelayer, three destroyers and a seaplane carrier. The transmontane raid postponed the Japanese projected conquest of Tulagi and Port Moresby for a month, the time necessary to replace the vital amphibious ships lost off New Guinea and marshal carrier air support. Commander, Aircraft Battle Force, later commended Ault for his work.
In the later Battle of the Coral Sea in May 1942, as Lexington'sAir Group Commander, Ault led Lexington's bombers into combat in the successful May 7 attack on the Japanese aircraft carrierShōhō, sinking the light carrier fifteen minutes after the first attack. The Shōhō was the first Japanese aircraft carrier sunk in World War II. Early in the morning on 8 May, Ault led the Lexington airwing's attack on the Japanese fleet carrierShōkaku. The attack was successful; the Shōkaku was damaged severely enough to warrant its removal from battle and its return to base at Chuuk. Both Ault and his radio-gunner, Aviation Radioman 1st Class William T. Butler, apparently suffered wounds when Zero fighters attacked the group commander's SBD Dauntless. Ault attempted to return to a friendly carrier deck, not realizing that the Lexington had taken mortal damage in his absence. Unaware of Lexington's distress, he radioed the ship at 14:49, to tell her that he had only enough gasoline for 20 minutes. Yorktown, which had taken over communications for "Lady Lex," heard Ault's broadcast but failed to pick him up on her radar. Informed that he was on his own but wished "Good luck." Ault changed course to the north, in a last vain attempt to be picked up on radar. Yorktown again wished him good luck. Ault, perhaps aware of the fate that lay ahead, radioed : "O.K. So long, people. We put a 1,000 pound hit on the flat top." No further word was received from Lexington's air group commander, and neither he nor Aviation Radioman Butler was ever seen again. No remains of his aircraft have ever been found. Both Ault and Butler were listed as Missing in Action and presumed dead on May 8, 1942.
Navy Cross
Ault's leadership of Lexington's air group in the Battle of the Coral Sea earned him the posthumous award of the Navy Cross. The citation reads:
Legacy
On September 25, 1943, the airfield at Naval Air Station Whidbey Island was named for Commander Ault. The, an Allen M. Sumner class destroyer in the United States Navy launched 26 March 1944, was also named for him.
