Just how far to have the main-boom over the side of the yacht, in sailing close-hauled, has never been settled; for it resolves itself to this. If the boom is hauled further inboard, the yacht sails nearer to the wind, but in an increased ratio loses its speed; for, if it should be hauled completely in till in a line with the keel, the yacht would stop, as has been explained: whilst, the farther out over the side it is allowed to go, the faster the yacht sails, but the farther also from the wind and the direction that it is desired to proceed in to windward. Hence a happy medium must be decided upon; and there is no doubt but what the result of most races has depended more upon the use of the main sheet, when close-hauled, or beating to windward, than upon any other cause. Just how flat to trim the sheets can only be acquired by experience; but the following general rules will apply:--
As a general principle, the sheets can be trimmed flatter, or farther aft, in light weather and a smooth sea, than in heavy weather and a head sea. In fact, it is impossible to sail as near the wind in lumpy water as in smooth water. After a yacht has been reefed, also, she will not lie as near the wind as before, for the same reasons that compelled the reefing.
With old hands, the yacht, when close-hauled, is allowed to, what sailors call, "go through the water," rather than to point up almost into the wind's eye, and keep bobbing up and down, and advancing very little. In most yachts it will be found by experiment that the main-boom should be at about the angle shown in the figure in the diagram on p. 46, marked "close hauled;" but others may be, perhaps, hauled slightly more inboard: but, as a general law, a good free sheet is the better, especially in a sea-way.
TO KNOW WHEN THE YACHT IS AS NEAR THE WIND AS SHE WILL SAIL
Is important, and it can always be known by the following method. Push the helm very slowly over to leeward, and, as the yacht commences to come towards the wind, keep the eye fastened upon the luff, or inner leach, of the mainsail. As soon as the yacht is too near the wind to have the sail stand full, a little wave will be seen to agitate the luff of the sail, from its head to the foot, usually commencing near the head, and just under the gaff, as that part of the sail is at a further angle from the wind than the part that is fastened to the main-boom; the gaff blowing out much further to leeward, not being confined by a sheet as the main-boom is. This wave, or shake, is caused by the wind getting on both sides of the sail, and, if persisted in, would bring the yacht to a stand-still, with the sail flapping in the wind's eye. But short practice will enable one to see almost instantly this commencement of a shake, that begins to show itself on the mainsail like a smile breaking over the countenance of a pretty woman; and at the first symptom reverse the helm, and keep the yacht in that position which is called sailing "by the wind," or "full and by;" that is to say, full sails, and by the wind. If, after the yacht is in this position, a bearing on shore can be taken to steer by, it will be a good thing; but as the wind often changes even several points, especially near the coast-line, every few moments, this experiment must be repeated; and it is this keeping a yacht up to her work, and never letting her fall off, and never shaking her, and yet taking advantage of every flaw, that goes to make up the accomplished helmsman. There are other signs besides these, which to a sailor are very simple, that denote to him when the yacht is off the wind; such as the angle at which the wind strikes his face, the direction of the wind on the face of the waters, and the line of the weather-vane at the main truck, and the smoke from his pipe: these will do for him as well as luffing and shaking the mainsail, but the latter method is the perfect one; and, if the yacht can be so steered as to keep just the suspicion of a little smile rippling its luff below the throat of the gaff, it will be the perfection of sailing "close-hauled," or "by the wind."