Pensacola class HEAVY CRUISERS
 
USN Heavy Cruiser CA-24 "Pensacola"
Displacement: 11,512 t (9,100 t Std)Machinery:8 boilers, 4 shafts  Main Guns: 10×8 in (203 mm)/55 Main Belt: 4-2.5 in 102-63.5 mm
Max Length: 585 ft 6 in 178.46 mMax Power: 107,750 hp 79 250 kW DP Guns: 8×1×5 in (127 mm)/25 Decks: 1.75-1 in 44.5-25 mm
Beam: 65 ft 3 in 19.89 mMax Speed: 32 kts 59.26 km/h AA Guns: 4×4×1.1 in (28 mm)* Barbettes: 0.75 in 19 mm
Draght: 19 ft 6 in 5.94 mRange: 10,000 nm 18 520 km AA Guns: 8×1×.79 in (20 mm)* Turrets: 2.5-.75 in 63.5-19 mm
Complement: 653 officers and enlisted Bunkerage: 3,952 t fuel oil Aircraft: 4 × SOC-1 Seagull CTower: 1.25 in 32 mm

  * Antiaircraft armament as during the Battle of Midway (June 1942).

Two Pensacola class heavy cruisers were the first U.S. “treaty cruisers”, designed under the limitations set by the Washington Naval Treaty, wich limited the displacement of cruisers to 10,000 tons, and its main battery caliber to 8 in (203 mm). Flush-decked and with their main battery equally divided fore and aft, they were handsome and well proportioned ships, but in an effort to remain within treaty limits the hull was of welded construction, and the armor belt was barely capable of with­stand­ing even 5 in (127 mm) gunfire.

Their main armament consisted of ten 8 in guns, in two twin turrets on the main deck, and two triple turrets two decks above, making it one of the two U.S. Navy ship classes to have different-sized turrets for main armament. The new 8 in gun cruisers brought a new capability to the fleet when they entered the service. They replaced the elderly fast battleships of the Scouting Force and served not merely as scouts but, perhaps much more importantly, as escorts for the new fast carriers in independent task force operations.

The Pensacolas were initially armed also with four 5 in (127 mm) double purpose guns, eight .50 in (12.7 mm) AA machine guns, and six 21 in (533 mm) torpedo tubes. But before the World War II began, the torpedo tubes were removed due to war gaming results from the Naval War College which indicated that the torpedoes were unlikely to be fired from a cruiser, and more a liability than an asset. At the same time the anti-aircraft armament was increased with four additional 5 in (127 mm) guns, and four of the new four-barrel 1.1 in (28 mm) autocannons.

One Pensacola class heavy cruiser (CA-24 Pensacola) took part in the Battle of Midway as a part of Task Force 16 Cruiser Group (Task Group 16.2).

 

Ship Builder Laid Down    Launched    Commisioned    Fate
 CA-24 Pensacola U. S. Navy Yard. New York, NY  27 Oct 1926   25 Apr 1929     6 Feb 1930   Sunk as target  10 Nov 1948
 CA-25 Salt Lake Sity  New York Shipbuilding, NJ  9 Jun 1927   23 Jan 1929   11 Dec 1929   Sunk as target   25 May 1948