Representatives and Contractors
From the very start, Robert Gilruth knew the importance to the STG of the various branches of the military. It relied on the Army for the Redstone launch vehicle, the Air Force for the Atlas, and the Navy for its Vanguard experience and the Johnsville centrifuge for astronaut training. Also the astronauts were all military, and required aeromedical and physiological support. Even though their pressure suits were made by B.F. Goodrich, they were of a Navy Mark IV design.