The incident involved an MV-22 Osprey belonging to the US Marines based in Okinawa, Japan. The third Marine Expeditionary Force said the aircraft had launched for “regularly scheduled operations” before it entered the water. Rescue teams recovered 23 people, but three service members are still missing. Australian media reported the incident happened during an attempt to land on an aircraft carrier. The MV-22 Osprey is a tilt-rotor aircraft, capable of carrying 24 people at a time in addition to four crew members. It is similar to a conventional plane, but has helicopter-like rotor blades which allow it to take off vertically, without a runway. Australia’s Daily Telegraph newspaper quoted military sources as saying that the accident happened as the aircraft was trying to land on the USS Ronald Reagan aircraft carrier.