Airship

An airship is a type of aircraft that utilizes bags filled with gases that are lighter than air to achieve liftoff and can be controlled from a main cabin. A zeppelin is a type of rigid airship.

Fallout 4
The Brotherhood once built an entire fleet of airships less advanced than the Prydwen on the West Coast. Some within the Brotherhood believe they were either destroyed fighting super mutant remnants after the fall of the Unity or dismantled for parts and materials. It is rumored that one crashed on an expedition somewhere in the Midwest.

Fallout Tactics
Some time after the fall of the Master, the Brotherhood of Steel used zeppelins to travel east, to locate and assess the extent of the remaining super mutant threat. However, while crossing the mountains, a great storm broke the main airship and blew it far off course. The ship suffered severe damage, with smaller sections torn loose from the main craft and never to be seen again. The damage caused by the storm also claimed many of the Air Convoy leaders, including Paladin Latham. The command zeppelin remained aloft, thanks to the efforts of the surviving crew, who managed to keep the wounded vessel aloft until it reached the outskirts of Chicago. There the ship crashed, and those who had lasted through both storm and the crash landing eventually formed the Eastern Brotherhood of Steel, a new organization, which diverged greatly from the ideals of the old Brotherhood. The wrecked zeppelin is to be found near the area later known as Osceolla. It was there that Paladin Latham, having somehow survived his ejection from the airship, established his main base after taking the name of Gammorin, and becoming leader of the super mutants to be found there.

Locations

 * The Prydwen, an airship seen operated by the Brotherhood of Steel in the Commonwealth.
 * An unnamed airship crashed somewhere in the American Midwest.
 * One of the wrecked zeppelins can be found near the area later known as Osceolla. It was there that Paladin Latham, having somehow survived his ejection from the airship, established his main base after taking the name of Gammorin and becoming leader of the super mutants to be found there.

Appearances
Airships appear only in Fallout 4 and Fallout Tactics.