* They are airships. Airships are lighter-than-air craft that use a combination of buoyant gases, such as helium or hydrogen, and aerodynamic lift to stay aloft. This makes them very different from airplanes, which use aerodynamic lift alone to fly.
* They are large. Zeppelins are typically much larger than airplanes. The largest zeppelins ever built were over 1,000 feet long and had a volume of over 3 million cubic feet.
* They are slow. Zeppelins typically travel at speeds of around 50 miles per hour. This is much slower than airplanes, which can travel at speeds of over 500 miles per hour.
* They are not very maneuverable. Zeppelins are not very maneuverable, and they cannot take off or land in strong winds. This makes them difficult to operate in bad weather conditions.
* They are expensive to operate. Zeppelins are expensive to build and operate. This is because they require a large amount of helium or hydrogen, and they also require a large crew.
Despite their disadvantages, zeppelins have a number of advantages over airplanes.
* They are very fuel-efficient. Zeppelins use very little fuel to travel long distances.
* They can carry a lot of cargo. Zeppelins can carry much more cargo than airplanes of the same size.
* They are very comfortable to travel in. Zeppelins are very quiet and smooth to ride in.
Zeppelins were once a popular form of transportation, but they were largely replaced by airplanes after the Second World War. However, zeppelins are still used today for a variety of purposes, including sightseeing, advertising, and military operations.