Wallace Beery and director William A. "Wild Bill" Wellman had more in common besides long and celebrated film careers: They were flyboys who loved piloting their own planes. This Man's Navy returns both - in feisty, fighting form - to the skies in a thrilling and sentimental World War II tale that salutes the lighter-than-air airships of the US Naval and Marine Corps. Ned "Old Gasbag" Trumpet (Beery) skippers a dirigible training unit a