The term "captured-air vehicle" could refer to various types of aircraft that rely on the aerodynamic properties of air to fly and stay aloft. Some synonyms for this term could include "aerostat," "airship," "blimp," "dirigible," "zeppelin," or "balloon." These types of aircraft are often used for surveillance, transportation, or entertainment purposes. They have been used for military purposes in the past but are now primarily used for advertising and sightseeing. Regardless of the intended use, captured-air vehicles have captured the imagination of people throughout history due to their unique ability to navigate the skies.