41. Dirigibles seem a common means of air transportation.42. In 1933 he was counsel to the Joint Congressional Committee to Investigate Dirigible Disasters. 43. Another was to attach transmitters to dirigibles . 44. Maybe a non-dirigible balloon is meant ? | date = July 2008 }} 45. He built and flew the first fully practical dirigible capable of routine, controlled flight. 46. The USS " Shenandoah " was the only dirigible to visit Camp Lewis. 47. Reconnaissance dirigibles , an airplane, troops and Coast Guard personnel were stationed at Montauk. 48. In the 1920s Moffett was fascinated with the lighter than air technology of the dirigibles . 49. Tom continues to improve on his airship designs, which are combined biplane and dirigibles . 50. Accomplishing the weekly shopping at a modern supermarket the size of a dirigible hanger is difficult.