southerly direction, and are flying at full speed upon a course which is roughly parallel with that which we have now taken up. During the past hour we have come round nearly twelve points—eight points go to a right angle—and are now speeding away from Jellicoe’s Grand Fleet, which is some forty miles distant to the north and west. Since we are faster than Jellicoe, the gap between us and him is steadily opening out. From the signal bridge, a very exposed position, we can see the turret guns below us and the spotting top above. The turrets swing round, as the gunners inside get their directions from the gunnery-control officer who, in his turn, receives every few moments the results of the range-finding and rate-of-change observations which are being continually taken by petty officers charged with the duty. Further corrections will be made when the guns begin to shoot, and the spotting officers aloft watch for the splashes of the shells as they fall into the sea. Naval gunnery, in spite of all the brains and experience lavished upon it, must always be far from an exact science. One has to do with moving ships firing at other moving ships, many factors which go to a precise calculation are imperfectly known, and though the margin of error may be reduced by modern instruments of precision, the long fighting ranges of to-day make the error substantial. The lower the visibility, the greater becomes the gunner’s uncertainty, for neither range-finding nor spotting can be carried on with accuracy. Even on the clearest of days it is difficult to “spot” a shell-splash at more than 14,000 yards (eight land miles), a range which is short for the huge naval gun. When many guns are firing, it is not easy to pick up the splashes of one’s own shells, and to distinguish between their water-bursts and the camouflage put up by an enemy.