Motor torpedo craft, known as "E" boats, are being used by the Nazis to attack British convoys in the Channel. These small but deadly craft are, in a way, a development of the racing "speed boat." Revolutionary principles of design have made possible present day types, which can attain a speed of more than 40 knots. But the M.T.B. is a fair-weather craft, and even then failed at Dunkirk.

August 1940