Ver Cuevana2. Part of the Airship History Series: Reviewing the history of U.S. Navy Zeppelin Patrol (ZP) squadrons and their lighter-than-aircraft from 1937-1945, this DVD includes rare government and private footage - even home movies - that shows you the construction of the non-rigid K-type airships; their huge hangar facilities; their deployment to the Caribbean, Central and South America, and Africa to defeat the German U-boat threat; and more.