The battleship is a large warship, with more firepower, armor, and shielding than cruisers, battlecruisers, and all classes below them. They are very expensive and very heavy, making them one of the slowest warships. There is also a noticeable size jump between most cruisers and battleships - where cruisers are manned by 8 crew, have 3 or 4 heavy weapons, and support 4 shield layers, most battleships are double the size, take close to 20 crew, can have 8 or more heavy weapons, and support over 6 shield layers. Battleships are unique in that they are the smallest class able to support anti-ship batteries, which are cannon-like weapons so large and powerful that they are known to punch holes right through cruisers. They often carry fighter bays in addition to their armaments, although never as many as a carrier-class would have. Battleships are the most common class used as a flagship in military fleets. While they cannot chase down a retreating destroyer escort, they can hold their own against many smaller ships, and usually serve as the backbone of their fleets during the heat of battle.