Atlanta-class cruiser

USS San Juan on 14 October 1944
Class overview
Name	Atlanta class
Builders	Federal Shipbuilding, NJ (2) Bethlehem Fore River, MA (2) Bethlehem San Francisco, CA (4)
Operators	United States Navy
Preceded by	Brooklyn class
Succeeded by	Cleveland class
Subclasses	Oakland class
Built	1940–1945
In commission	1941–1949
Completed	8
Lost	2
Retired	6
General characteristics
Class and type	Light cruiser
Displacement	6,718 long tons (6,826 t) (standard) 7,400 long tons (7,500 t) (full load)
Length	530 ft (160 m) wl 541 ft (165 m) oa
Beam	52 ft 10 in (16.10 m)
Draft	20 ft 6 in (6.25 m)
Propulsion	4 × 665 psi boilers 2 geared steam turbines 75,000 hp (56 MW)
Speed	32.5 knots (60 km/h) (design); 33.6 knots (62 km/h) (trials)
Range	8,500 nautical miles (15,700 km) at 15 knots (28 km/h)
Boats & landing craft carried	2–4 × lifeboats
Complement	As designed: Officer: 35 Enlisted: 638 Oakland class: Officer: 47 Enlisted: 766
Sensors and processing systems	2 × Mk37 GFCS SC search radar SG-1 surface-search radar
Armament	As designed: 8 × dual 5"/38 caliber guns 4 × quad 1.1"/75 caliber guns 6 × single Oerlikon 20 mm cannons 2 × quad Mark 15 torpedo torpedo tubes Oakland class: 6 × dual 5"/38 caliber guns 8 × dual Bofors 40 mm guns 16 × single Oerlikon 20 mm cannons 2 × quad Mark 15 torpedo torpedo tubes
Armor	Belt: 1.1–3+3⁄4 in (28–95 mm) Deck: 1+1⁄4 in (32 mm) Turrets: 1+1⁄4 in (32 mm) Conning Tower: 2+1⁄2 in (64 mm)

The Atlanta-class cruisers were eight United States Navy light cruisers which were designed as fast scout cruisers, flotilla leaders, or destroyer leaders, but which proved to be effective anti-aircraft cruisers during World War II. They were also known as the Atlanta-Oakland class. The Atlanta class originally had 16 x 5-inch (127 mm)/38 caliber guns in eight two-gun turrets, arranged with three superfiring turrets forward, three more superfiring aft and two waist mounts, one port and one starboard, giving the first four Atlanta-class cruisers the heaviest anti-aircraft armament of any cruiser of World War II. The last four ships of the class, starting with Oakland, had a slightly revised armament with a reduced main gun battery - the waist turrets being deleted - as they were further optimized for anti-aircraft fire in light of war experience.

The Atlanta class saw heavy action during World War II, collectively earning 54 battle stars. Two ships of the class were sunk in action: Atlanta and Juneau, both at the Naval Battle of Guadalcanal. The other six were decommissioned shortly after the war and were scrapped in the 1960s.