Passage: The ship, originating from Salalah, Oman was bound for Mombasa, Kenya after a stop in Djibouti with a crew of 23, loaded with 17,000 metric tons (19,000 short tons) of cargo. On 8 April 2009, four pirates based on FV Win Far 161 attacked the ship. All four of the pirates were between 17 and 19 years old, according to U.S. Secretary of Defense Robert Gates.The crew members of Maersk Alabama had received anti-piracy training from union training schools, and had drilled aboard the ship a day previously. Their training included the use of small arms, anti-terror, basic safety, first aid, and other security-related courses. When the pirate alarm sounded early on 8 April, Chief Engineer Mike Perry brought 14 members of the crew into a "secure room" that the engineers had been in the process of fortifying for just such a purpose. As the pirates approached, the remaining crew fired flares. In addition, Perry and 1st A/E (Assistant Engineer) Matt Fisher swung the ship's rudder, which swamped the pirate skiff.Nonetheless, the ship was boarded. Perry had initially taken main engine control away from the bridge and 1st A/E Matt Fisher had taken control of the steering gear. Perry then shut down all ship systems and the entire vessel "went black." The pirates captured Captain Richard Phillips and several other crew members minutes after boarding, but soon found that they could not control the ship.

Question: Who caused the entire ship to go black?
Perry