A cult classic of both the disaster genre and the parody genre is this 1976 film that takes place on board the nuclear-powered Cyclops, which over the course of the film is subject to a bomb blast that kills its operator, a bomb blast that disables its brakes, and a man-made earthquake that surprisingly didn't involve any bomb blasts. Give me the title of the film, and you give me what type of vehicle was Cyclops.
"The Big Bus"