The first improvement design based upon the Series One Columbia Class Battlestar, Series One-Alpha Atlantia sub-Class Command Battlestars embarked a maximum wartime load of 200 Vipers divided into 10 squadrons of 20 each, but typically operated during peacetime with a more modest load of 100 Vipers divided into 5 squadrons of 20 each. In addition to her airwing, they possessed an extensive battery of 32 Dual-Barrel Heavy Kinetic Energy Cannons for engagement of capital ships and orbital bombardment and a formidable secondary array of 418 Dual-Barrel Close-In-Weapon Batteries for anti-aerospace craft defense. For additional striking power, the Atlantia sub-Class had a complement of 16 variable-yield nuclear missiles in silos along the dorsal section of the hull, an increase over the 12 carr