William Murdoch the First officer of Titanic on the fateful night. It was hinted at but never fully layed on Murdoch in the inquires after the tragedy in 1912, considering that he died in the sinking.
He was given orders at 10pm from the Captain to keep course and speed and to follow safety procedures with ice. At 11.40pm an iceberg was reported dead ahead, half a mile out and Murdoch made a fatal error. He ordered a full stop, engines in astern and the port around manoeuvre from the ships wheel.
By putting the engines in reverse he compromisied the action of the ships rudder, slowing the turning process. If turned at full speed at that distance the ship would have had more manoeuvreability and should have veered off in time. His other option was to put the engines to full stop and let her hit by the bow, damaging the vessel but not fatally.