How simple it sounds, doesn’t it? but the practical execution of such signals is not so easy in a fog, when the guide you are groping after cannot be seen and is able to show herself only by the bubbles which rise in her wake. Add to this that you have all had to reduce your speed by signal, which means that if you obey the signal a minute too late your excess speed causes you to rush up alongside your next ahead, or if you obey too soon you will drop astern and can no longer pick out those invaluable swirls and bubbles. But, worst danger of all, if one ship misses the signal and holds steadily on her course whilst her consorts ahead and astern and on each side of her turn at right angles, what is going to prevent a collision? ‘Joss,’ and ‘joss’ in large quantities, is the only preventative I can cite, and this was the very element that was absent that day. One of the rear destroyers was the ‘lucky party’ who missed the signal—the first alter course signal by wireless—and she continued on her course, whilst those ahead and outside her altered across her bows. The aforesaid ‘joss’ might have caused her to cross the line through a gap, but instead there suddenly loomed right ahead of her, out of the dense pall of fog, the blurred silhouette of a light cruiser, and before ever the engines could be reversed or the helm put over she had crashed bows on at twenty knots into the beam of the cruiser. The comparatively frail bows of the destroyer crumpled under the blow like so much brown paper, and the boat recoiled with fifteen feet of her bow ‘concertina-ed’ in. Yet never a soul on board of her was hurt. ‘Joss’ certainly made up leeway there, but in the bigger vessel such was not the case. The impact of the blow had lifted a torpedo tube off its mounting and had thrown it inboard against the casings, crushing five unfortunate men, of whom three lost their lives. In addition the hull of the ship had suffered considerable damage, so that her speed was reduced to a bare ten knots, whilst the destroyer, at first able to steam six knots, could soon make no headway at all. And all this, mark you, within thirty miles of the German coast in a ‘pea-soup’ fog, so that no sooner had the two ships collided and fallen apart than they were lost to sight of each other and of the remainder of the fleet, who continued their groping course seaward, the majority unaware that aught was amiss. One destroyer, however, had noted the accident, and altering out from her station stood by her damaged consort and forthwith made preparations to take her in tow; for if one thing was more evident than another, it was the desirability of getting the damaged ships away to seaward before the fog should lift leaving them to be discovered by some inquisitive Hun submarine or aircraft patrol.