Britain's human torpedoes and midget submarines are given their due in this straightforward narrative of men and machines. The human torpedoes consisted of a small craft manned by two men in diving suits who detached themselves before the hit. The midget X-craft, crewed by three or four men, was a miniature submarine. Both types operated from depot ships. The men trained in England and Scotland and saw action from Norway to Sicily to Australia, and became vital facets of the allied sea victories. Doubtless as an official history this is competent and accurate, but in the stilted, rather passive telling, it deadens the human angle. And thereby curtails the general market appeal.