The film is famous for a camera trick Hitchcock invented to represent Scotty's vertigo - a simultaneous zoom-in and pull-back of the camera that creates a disorientating depth of field.
The novel experience of being able to debate at least some of the things they want to debate has been exhilarating for MPs, and rather disorientating for the party whips.
He says divers have told him that it is dark and difficult to see inside the ship, and that it is disorientating swimming along corridors that have been turned on their side.