MORE ABOUT THE GERMAN MIDGETS
... 'The German Navy employed three types of midget U-boats, of which the two one-man types are shown above and on the right. That known as Biber has a surface displacement of 6 tons. Its length is 29 ft. 6 ins. and overall beam 4 ft. 9 ins. It is armed with two modified electric torpedoes, slung one on either side outboard. These have a range of about 5,000 yards at 20 knots. In place of one or ...