The Goodyear blimp at sporting events was a mainstay for many years/decades. To use a blimp during wartime? Well, that is pretty dangerous as blimps have almost no maneuverability. If they encounter the enemy, they are dead.
A great story - whatever happened to the 2 crewman??
No one knows what happened. Conspiracy theories abound. But they probably fell into the water at some point. Maybe one of them tried something and then the other tried an ill-fated rescue? We'll never know.
Thanks for answering. An unsolved mystery always generates various conspiracy theories. Still very interesting.