The line, you are told, is not a line at all, but a convoy, in fairly regular formation. The nearest spot is a destroyer, zigzagging on the flank; the others are ships which have been so effectively ‘dazzled’ that their shapes are unrecognisable. You carry on, in hope of something nearer, and suddenly a much larger object comes into the field of vision. A ship, of course, though it does not look like any ship you have ever seen; and you are asked to guess its distance and direction. You are bewildered at first; for as you were moving the lens rapidly to starboard, the vessel came in rapidly to port, and as her dazzle-paint makes her stern indistinguishable from her bows, you continue to think she is steaming in that direction. After a more careful observation, this mistake is corrected. She is crossing us from port to starboard. But at what angle? This is vitally important, for the possibility of getting in a successful shot would depend entirely upon the answer. We are ourselves heading about due north: she is crossing to the east: if her course is south of east, she is coming nearer to us, and our torpedo would strike her before the beam--the most favourable chance. If, on the contrary, her course is north of east she is going away, and the torpedo would have a poor chance of hitting her abaft the beam. In fact, it would not be worth while to risk losing so costly a shot. A torpedo at present prices is worth not far short of £2000, and we only carry two for each tube. You look long and hard at this dazzle-ship. She doesn’t give you any sensation of being dazzled; but she is, in some queer way, all wrong--her proportions are wrong, she is somehow not herself, not what she ought to be. If you fix your attention on one end of her, she seems to point one way--if you look away at her other end, she is doing something different. You can’t see the height of her funnels clearly, or their relative position. But, with care, you decide that she is coming about south-east and will be therefore your bird in two minutes’ time. The Commander is interested. He takes a look himself, laughs, and puts you back at the eye-piece. You hold on in hope that he may, after all, be wrong; but the bird ends by getting well away to the north-east. Your error covered just ninety degrees, and the camouflage had beaten you completely. You begin to think that the ingenuity at command of the nation has been underestimated. But this ship is nothing of a dazzle, the Commander tells you--he can show you one whose cut-water seems always to be moving at a right angle to her stern! [Illustration: ‘Does not look like any ship you have ever seen.’]