The SOE semi-submersible canoe was nicknamed the 'Sleeping Beauty'. It was battery powered, had a top speed of 4.4 knots, and could travel for some 30 miles at a cruising speed of 3 knots.

They also came in the form of briefcases. To open the case safely, the SOE agent had to make sure that the right hand lock was pressed down and held to the right. If this wasn't done, the left ...