[12] In the United States Senate inquiry into the sinking of the Titanic, Haddock was interviewed by William Alden Smith on 25 May 1912.
[12] Seven weeks after the Titanic disaster, Haddock, steaming at night, almost ran the Olympic aground on rocks near Land's End.
[5] On 9 October 1912 White Star withdrew Olympic from service and returned her to her builders at Belfast to have modifications added to incorporate lessons learned from the Titanic disaster six months prior, and improve safety.
With the start of the First World War, in October 1914, Haddock was back in command of Olympic during her attempt to assist the battleship HMS Audacious after she had collided with a German mine off the western coast of Scotland.
[5] Haddock was redeployed to command a dummy fleet of wooden dreadnoughts and battle cruisers, and was stationed in Belfast.
[5] In 1915, Harold Sanderson, head of International Mercantile Marine, tried to reassign Haddock to captain Britannic when she was converted to a hospital ship.
[5][14] From 5 to 14 May 1917, Haddock sailed from Liverpool to New York City as a passenger aboard the SS Saint Paul,[2] six months before she was taken over for wartime service.
The voyage's manifest shows that Haddock's trip was funded by the Admiralty,[15] and states that his final destination was Newport News, Virginia, where he would be received by the British Navy.
Later that year he made a second trip to the United States arriving in New York on 31 August 1917 as a passenger aboard the White Star liner RMS Adriatic with his occupation listed on the manifest as "naval officer" and a final destination of Norfolk, Virginia.
[15] After the armistice that ended World War I, Haddock continued to serve as Royal Naval Reserve aide-de-camp to King George V until he was succeeded in that role by White Star commander Charles A. Bartlett on 16 July 1919.
[1][7] A 1911 story in The New York Times described Haddock as the "only skipper in the Atlantic trade who wears the mid-Victorian mutton chop whiskers without a beard or mustache".