Up to the early part of the eighteenth century it was a general complaint that ships of war had more guns placed on board than they could carry—in consequence, that their lower batteries could not be opened when there was any sea on, and that they sailed and worked heavily. It is wonderful, indeed, how British seamen managed to keep them afloat, as it is worthy of note that those which fell into the hands of the enemy were nearly always lost under charge of their new masters. The English, it was said, employed the best materials and workmanship on their vessels, but the French greatly surpassed them in their models. The English were the first to abandon the flat form of the stern under the counter, and to introduce the curved instead, by which greater strength and lightness as well as beauty was obtained.
In 1748 a ship of 585 tons, to carry 28 guns, 9-pounders on the main-deck and 3-pounders on the quarter-deck, was built; and in 1757 five other vessels, also called frigates, to carry 28 guns, were constructed of fir instead of oak, of the same size; but one of them was captured by the French, and the others in about nine years were broken up as unserviceable.
The first ship which, according to our present ideas, could properly be considered a frigate, was the Southampton, built at Rotherhithe in the year 1757 by Mr Robert Inwood, according to a draft of Sir Thomas Slade, one of the surveyors of the navy. She measured 671 tons, and mounted 26 12-pounders on the main-deck, 4 6-pounders on the quarter-deck, and 2 6-pounders on the forecastle. She thus carried all her guns on a single whole deck, a quarter-deck and forecastle, the characteristic of the true frigate. She was considered a prime sailer and first-rate sea-boat, and lasted for fifty-six years, and possibly would have lasted longer had she not gone to pieces on the rocks.
Shortly after this several 36-gun frigates were built. Each was about fifty tons larger than the Southampton, and carried four guns more, which were placed on the quarter-deck.
Several French 36-gun frigates captured by the English were found to be considerably larger. One, the Dana, was of 941 tons; and three French 32-gun frigates averaged about 700 tons, though armed like the Southampton.
About 1779 five frigates of 38 guns, and averaging 946 tons, were launched. They were the Minerva, built at Woolwich, the Arethusa, Latona, Phaeton, and Thetis. They were first armed with 28 18-pounders on the main-deck and 10 6-pounders, 8 18-pound carronades and 14 swivels on the quarter-deck and forecastle, and with a complement of 270 men. Shortly afterwards the complement was increased to 280 men, 9-pounders were placed on board instead of the sixes, the swivels were omitted, and carronades substituted.
About the same time frigates of 880 tons, to carry 36 guns, 18 and 9-pounders, were built.
Formerly, as has been seen, a number of small vessels were classed as frigates. About the year 1775 they were placed in a different rate, and those carrying 20 guns had now the name of 20-gun post-ships given to them, signifying that they were commanded by post-captains. Afterwards vessels still called frigates, carrying 24 guns, were also ranked as post-ships. The French called vessels of this size corvettes, from the Italian word corvettore, to leap or bound, from which we have derived the word curvet. The French afterwards applied the name to ships of 24 guns. In order to mount all these guns on a single tier, it was necessary to increase the dimensions of the ship, and thus she could carry heavier metal than those ships mounting their guns on a quarter-deck and forecastle. The English, following their example, afterwards called all ships carrying 24, 22, and 20 guns post-ships, and those carrying 18, 16, and 14, or any less number, ship-sloops, to which the general term of corvette was afterwards applied. The English did not apply the term corvette to brigs, but designated such two-masted vessels as brigs-of-war, though they are sometimes spoken of as brig-sloops.
It will thus be understood that a ship that mounts 24 guns at least on a single-deck, and other guns on a quarter-deck and forecastle, is properly called a frigate. When, however, the waist is decked over and has raised bulwarks with ports in them filled with guns, the vessel becomes a two-decked ship.
It is necessary to explain the term “flush.” In sea language it means level, a flush-deck is consequently a level deck extending fore and aft. Such are all the decks of a man-of-war, except of the upper ones. Many merchantmen are also built in the same way, but others rise abruptly a foot, or two or three feet, towards the stern, the higher part of the deck becoming the quarter-deck. Ships thus built are spoken of as deep-waisted, because the centre part is deeper or lower than the after-part. The bulwarks in the same way sink in proportion at the break of the quarter-deck. Up to the present day many of the largest ships-of-war are flush-decked, as are all brigs-of-war and many corvettes, but a frigate, which must have a quarter-deck and forecastle, cannot properly be said to be flush-decked, although, in fact, the gratings or gangway at the waist give her the appearance of being so to the unsophisticated eye.