class cruiser class cruisers class heavy cruisers built imperial_japanese_navy order save design time ships essentially repeats earlier class begun world war lead ship launched process converted light aircraft carrier construction suspended scrapped beginning unnamed second ship scrapped month laid order clear aircraft carrier design description design class minor improvement pair class ships upgraded late 1930s main improvement replacement triple torpedo tube mounts older ships quadruple mounts cost crew officers enlisted men ships length meters overall beam meters draft meters displaced metric tons long tons standard load metric tons long tons load fitted geared steam turbine sets total shaft horsepower driving meter propeller steam provided drum water tube boilers operated pressure cm2 kpa psi temperature ships designed speed knots mph carried tonnes long tons fuel oil gave estimated range nautical miles knots mph electrical power supplied turbo generators diesel generators armament main armament class intended caliber 3rd year type guns mounted twin turrets forward aft superstructure numbered bow stern forward turrets level turret guns maximum elevation fired kilogram projectiles muzzle velocity maximum range elevation ship carried rounds gun secondary armament consist caliber type anti aircraft guns twin mounts fired kilogram projectiles rate rounds minute muzzle velocity provided maximum range meters maximum ceiling meters ships intended equipped twin type light guns abreast funnel fired kilogram projectiles muzzle velocity provided maximum range meters effective ceiling meters maximum effective rate fire rounds minute frequent need change round magazines twin type machine gun mounts supposed mounted bridge rounds gun class ships intended armed rotating quadruple type torpedo tubes broadside ship carried type torpedoes tubes reserve quick gear installed mount allowed reserve torpedoes loaded minutes ideal conditions type torpedo fueled compressed oxygen widely referred post war literature long lance range speed settings range meters speed knots mph meters knots mph meters speed knots mph launched proposal replace aircraft equipment type torpedo tube mounts mounted centerline fire control sensors aircraft type fire control directors atop bridge funnel going fitted control main guns range data received meter coincidence installed turrets nos primary rangefinder mounted bridge pair type high angle directors bridge intended control type guns director fitted meter rangefinder guns controlled type directors mounted bridge early warning provided type model air search radar mounted foremast type passive system fitted bow ships designed carry aircraft platform funnel mainmast consisted seat seat launched pair aircraft aircraft platform ships carried total powder charges kilogram bombs aircraft armor ships armor scheme slightly modified class cruisers waterline armoured belt extended way double extended forward rear magazines fore aft turrets angled vertical improve resistance horizontal machinery spaces millimeters thick tapered millimeters outer ends fore aft machinery compartments protected millimeter transverse bulkhead sides magazines belt millimeters thick tapered magazines protected fore aft transverse bulkheads millimeters thick steering gear rudder compartments sides consisted millimeter plates ends protected millimeters armor deck steering gear millimeters thick thickness armored deck ranged millimeters flat millimeters slope sides conning tower millimeters thick roof millimeters thick main gun turrets millimeters armor sides roof barbette armor ranged millimeters thickness ammunition secondary armament protected millimeters armor funnel provided millimeters armor separate anti torpedo bulkhead function performed lower extension belt armor ships class cruisers ordered november ships laid names warships named april ordered scrapped month laid order clear carrier laid october launch construction suspended july fate discussed possible conversion fast considered navy decided august convert light aircraft carrier naval arsenal work conversion begin incomplete hull towed december originally intended complete march extended august construction suspended march ship complete allow construction small submarines scrapped november august
Ibuki-class cruiser