មាតិកា
Captain Frank Marvin and Lieut. Bob Chase are army draftsmen in the Ordnance Department. Marvin is working on plans for a submarine that is expected to revolutionize warfare. One of the foreign governments is anxious to obtain the plans.
Captain Frank Marvin and Lieut. Bob Chase are army draftsmen in the Ordnance Department. Marvin is working on plans for a submarine that is expected to revolutionize warfare. One of the foreign governments is anxious to obtain the plans.
Benelux
Southeast Asia
Africa