The men-of-war in which Anson went to sea were built mostly of oak. They were painted externally yellow, with a blue stripe round the upper works. Internally, they were painted red. They carried cannon on one, two, or three decks according to their size. The biggest ships carried a hundred cannon and nearly a thousand men. The ship in which this famous voyage was made was of the middle size, then called the fourth-rate. She carried sixty cannon, and a crew of four hundred men. Her lower gun deck, a little above the level of the water, was about 140 feet long. She was of about a thousand tons burthen.<br><br>Though this seems small to us, it is not small for a wooden ship. It is not possible to build a long wooden ship. The Centurion, though short, was broad, bulky, and deep. She was fit for the sea. As she was built more to carry cannon than to sail, she was a slow sailer. She became slower as the barnacles gathered on her planks under the water. She carried three wooden masts, each fitted with two or three square sails, extended by wooden yards. Both yards and masts were frequently injured in bad weather.<br><br>The cannon were arranged in rows along her decks. On the lower gun deck, a little above the level of the water, she carried twenty-six twenty-four-pounders, thirteen on a side. These guns were muzzle-loading cannon which flung twenty-four-pound balls for a distance of about a mile. On the deck above this chief battery, she carried a lighter battery of twenty - six nine - or twelve - pounder guns, thirteen on a side. These guns were also muzzle-loading. They flung their balls for a distance of a little more than a mile.<br><br>On the quarter-deck, the poop, the forecastle, and aloft in the tops (the strong platforms on the masts), were lighter guns, throwing balls of from a half to six pounds' weight.