Airships produce lift by displacing air in a rigid or semi-rigid envelope with another gas such as helium, hydrogen, or a heated gas. This makes the entire envelope lighter than the air that is displaced. Examples would include Zeppelins, dirigibles and blimps.
This category is for sites that contain a recreational, historic or hobby focus. This can include sites that are spotter sites, historic accounts and image galleries. Sites that have a commercial focus will not be listed in this category and should be submitted to the appropriate Business/ category such as the Business/Advertising/Promotional_Items/Business_Items/Balloons_and_Blimps/ category.