An airship (10) comprising an envelope and a ballonet (32) positioned within the envelope (30). Drive means is provided for supplying lateral thrust for the airship, to improve lateral control of the airship. The drive means has a dual function as it has an air supply system with an air inlet provided at the bow of the envelope of the airship for supplying air to the balonet (32) to aid pressurisation. A mooring system and detachable gondola (14) is also disclosed.
