Anton Heinen's "Rigid Airmanship" represents the last foray of the United States Navy into the training of rigid airship crews. Produced for the class of 1941, it came after the scrapping of the Navy's final rigid airship, and five years after one had been in operational service.
Yet, while the students for whom this textbook was written would never go on to crew a rigid airship, the document remains a significant and dense reference guide to the intricacies of operating the largest flying machines in history.