Airship

An Airship is a lighter-than-air craft that uses buoyant gasses to float in the air. Due to their passive flotation abilities, an airship can possess a greater range and fuel efficiency than airplanes, such as a flying boat.

Airships varied in their design, but most airships seen appeared to possess a rigid frame to support its gas bladders. This design is usually referred to as a zeppelin.

Initially, airships were only in possession of nations outside of Paradis, due to its century-long isolation from the rest of the world. However, by 854 the Survey Corps utilized an airship to extract its troops from its Raid on Liberio.

History
By the year 817, Marley was operating at least one airship. This airship was followed by Grisha and Faye Yeager out of the internment zone to its hangar, where they would get punished by Marleyan officers of the PSA for trespassing. After his physical punishment, Grisha was allowed to continue watching the craft with the officer.

Sometime later, Armin Arlert's parents attempted to escape the Walls using a hot air balloon. Unfortunately, the Military Police caught wind of their attempt, and they were promptly killed, leaving Armin an orphan.