Practical Boat-Sailing: A Concise and Simple Treatise

by Douglas Frazar

In other words, in all fore-and-aft sails, such as are used almost the world over for small sail-boats, the sheet, or rope that confines the after-part of the sail to the stern-part of the boat, is the key to the whole science of boat-sailing.

If one knows how to use the sheet properly, one knows how to sail a boat with comparative safety. Of course it is supposed that he should also understand flaws of wind and their effects.

It is the flaws of wind caught by the sail—more than it can bear—that capsize a boat; and, if the wind that has force enough to do this could be "spilled" out of the sail, the boat would be immediately relieved.

Therefore to insure safety, the person steering a boat should never belay the sheet, but keep it in hand, so as to be able to slack it off gradually, or cast it off entirely at a moment's notice. To do this, only one turn should be taken round the cleat; so that the sheet will slip under the force of a gust of wind, when the hand retaining it in place slackens it in the slightest degree.

If the whole sail points towards the wind's eye, it no longer has any effect upon the boat. The sail then shakes in the wind exactly as a flag does from the top of a flag-staff, the wind passing by on both sides. Should the sheet be hauled aft, the sail would be filled with wind upon one side, and, if the wind had strength to overcome the gravity of the boat, capsize her.

Or, if the boat is so heavy ballasted that its gravity cannot be readily overcome, the mast or sail are liable to be carried away, and danger incurred on account of the towing mast and sail. These would most likely draw the boat into the trough of the sea, where she would be swamped almost instantly.

It does not follow, because the slacking of the sheet is a safe thing to do, that it should always be done. With boatmen who are thoroughly practised, it seldom is done; for they can obtain the same result with the rudder by bringing the boat into the wind until the sail shakes, with the sheet still fast. This gives more control of the boat than would be the case if the boom were out to leeward, perhaps dragging in the water, on account of the pressure of the wind upon the hull and mast.

The very best thing to do in a sudden squall is to use a modification of both these methods; i.e., slack off the sheet for a foot or two, so that the sail, before it can fill with wind, will be at such an angle with the hull, that the shock upon the latter cannot be great. This gives one more command of the boat, and insures quicker movement of the hull, and hence quicker obedience to the helm, should a sudden change occur. This slacking of the sheet also prevents the boat from going about on the other tack, should she be brought too suddenly to the wind.

With an experienced hand at the helm, unless the squall is very severe, there is no need of luffing so as to shake the sail to any great degree. The slightest movement of the tiller will keep the sail just quivering in the wind, the boat still advancing, so that she will not lose steerage-way; thus enabling one to at once luff up nearer to the wind, or change the boat's position rapidly, should the wind, which is often the case, shift its direction suddenly.

Nothing is of more importance than to keep steerage-way on the boat, as it is only in the utmost emergency that the sheet should be slacked wholly off, and the headway lost.