ABSTRACT
None of the high-speed craft available in 1940 or, indeed, for a long time afterwards, had sufficient range and speed to operate from bases in the United Kingdom to pinpoints further south than Brest. Clandestine sea-transport operations into the Bay of Biscay, which contained intelligence targets of the highest strategic importance, could therefore be carried out only by submarines or by craft that could pass as fishing vessels; or by a combination of the two.
