Douglas C-47

A 1940s transport, such as the Douglas C-47 seen here, could fly more than 320 kilometers (200 miles) per hour and reach altitudes where the temperature fell well below freezing. Sticking one’s head out of the airplane to take sightings was no longer an option. 

Caption:
An astrodome on a Douglas C-47, circa 1944.
Type: Photograph
Credit: National Air and Space Museum, Smithsonian Institution.
NASM 00038219
Innovations
Navigation Methods
 
An astrodome on a Douglas C-47, circa 1944.