This page has a lot of information about the two airships built by the US Navy in the early 1930s.
The ships were equipped with hangars, approximately 75′ long x 60′ wide x 16′ high, which could stow and service up to five aircraft in flight. Aircraft were launched and retrieved by means of a trapeze, and could enter and exit the hangar though a large T-shaped opening at the bottom of the hull.