ACX Crystal is a container ship built in 2008 by STX Offshore & Shipbuilding at their Jinhae shipyard in Changwon, South Korea.

[4] Her main engine, manufactured by STX, is an 8-cylinder MAN B&W 8K80MC-C low-speed diesel engine with a maximum continuous rating of 28,880 kW (38,730 hp), giving ACX Crystal a maximum speed of 25.3 knots (46.9 km/h; 29.1 mph) and a service speed of 23 knots (43 km/h; 26 mph).

[citation needed] In June 2017, ACX Crystal was employed by NYK on its 'PX1' (Phoenix 1) intra-Asia trade line linking Japan, Vietnam and Thailand ports.

As NYK, MOL and "K" Lines shipping are creating new joint venture company under new brand name of Ocean Network Express (ONE), now ACX Crystal serve as the ONE fleet under PID service which have direct port rotation of Singapore-Port Kelang (North)-Subic Bay-Manila-Singapore-Surabaya-Singapore At 01.30 local time on 17 June 2017 (17.30 UTC 16 June), ACX Crystal, carrying 1,080 containers from Nagoya to Tokyo, reported that it had collided with USS Fitzgerald near Shizuoka, Japan, about 56 nautical miles (104 kilometres; 64 miles) south of the Yokosuka Japanese and US naval base at the entrance of Tokyo Bay.

[2][7] On 17 August 2017, Vice Chief of Naval Operations Admiral William Moran stated that "serious mistakes" were made by the Fitzgerald's "bridge team" (those conducting safety watch on board the ship's bridge) which caused them to lose "situational awareness," thus rendering it impossible to avoid the collision even after the ACX Crystal was sighted.