In August, the safety board concluded its investigation into a February 13, 2008, incident in which two pilots aboard a Go airlines flight fell asleep and traveled 26 miles beyond the destination of Hilo, Hawaii, before waking and contacting air traffic controllers.
They are semi-submersible heavy lift ships, which is to say that the ships are designed to be ballasted down so that their main decks go underwater, allowing their cargo to be floated aboard.