NAVAL TACTICS.
On being told the number and size of the sails which a vessel can carry (that is to say, can sail with, without danger of being upset), the uninitiated seldom fail to express much surprise. This is not so striking in a three-decker, as in smaller vessels, because the hull of the former stands very high out of the water, for the sake of its triple rank of guns, and therefore bears a greater proportion to its canvas than that of a frigate or a smaller vessel. The apparent inequality is most obvious in the smallest vessels, as cutters: and of those kept for pleasure, and therefore built for the purpose of sailing as fast as possible, without reference to freight or load, there are many the hull of which might be entirely wrapt up in the mainsail. It is of course very rarely, if ever, that a vessel carries at one time all the sail she is capable of; the different sails being usually employed according to the circumstances of direction of wind and course. The sails of a ship, when complete, are as follows:—
The lowermost sail of the mast, called thence the mainsail, or foresail; the topsail, carried by the topsail-yard; the top-gallant-sail; and above this there is also set a royal sail, and again above this, but only on emergencies, a sail significantly called a sky-sail. Besides all this, the three lowermost of these are capable of having their surface to be exposed to the wind increased by means of studding sails, which are narrow sails set on each side beyond the regular one, by means of small booms or yards, which can be slid out so as to extend the lower yards and topsail-yards: the upper parts of these additional sails hang from small yards suspended from the principal ones, and the boom of the lower studding-sails is hooked on to the chains. Thus each of the two principal masts, the fore and main, are capable of bearing no less than thirteen distinct sails. If a ship could be imagined as cut through by a plane, at right angles to the keel, close to the mainmast, the area, or surface, of all the sails on this would be five or six times as great as that of the section or profile of the hull!
The starboard studding-sails are on the fore-mast, and on both sides of the main-top-gallant and main-royal; but, in going nearly before a wind, there is no advantage derived from the stay-sails, which, accordingly, are not set. The flying-jib is to be set to assist in steadying the motion.