Transatlantic blimp:  An airship capable of crossing the Atlantic Ocean

Relies on lighter-than-air gas for buoyancy (e.g., helium) 

Specially designed for long-distance flights over the ocean 

Requires a large gas envelope for lift 

Envelope constructed from durable materials 

Propelled forward by engines powered by fuel (gasoline or diesel) 

Communication systems for ground control and other aircraft 

Safety features including redundant systems, life-saving equipment, and emergency procedures 

Navigation and control systems necessary for position, weather monitoring, and course corrections 

Rigorous training for crew and passengers