french cruiser fast cruiser built french_navy late 1920s able carry troops deck fast troop transport shortly completion modified gunnery training ship replacing elderly armored cruiser shortly beginning world war reverted original role gunnery training equipment removed sent french morocco war began lay minefield order cancelled day later ordered naval mines exploded landing mines september design decided build fast naval programme debut early 1920s similar respects armed single destroyer caliber guns smaller faster fast transport troops sides deck normally open weather metal panels close carrying troops general characteristics long overall beam draft framed hull subdivided transverse watertight bulkheads extensively superstructure save weight resulted problems strength issues fitted single rudder powered electric motor weak job turning circle rudder mph larger long tons light cruiser longer totally relied watertight subdivision survival propulsion shaft unit machinery layout alternating boiler engine rooms single reduction impulse geared steam turbines designed shp shp trials small tube boilers powered turbines pressure cm2 kpa psi auxiliary boiler fitted heat cool ship magazines provide drinking water propeller shaft drove bladed bronze bladed propeller designed speed mph achieved mph trials long tons fuel oil carried originally calculated provide endurance nmi mph revised downwards nmi entered service demands auxiliary machinery seriously turbo generators provided electricity volts diesel generators mounted aft engine room provide power harbor installed special compartment deck emergency use armament originally intended carry single turrets fore aft guns anti aircraft guns light guns guns substituted guns construction began guns added lieu guns construction guns retained future use caliber guns mounts gun shields guns fore aft superfiring positions centerline elevation limits arc fire rate fire nominal rounds minute proved considerably service maximum range shell muzzle velocity rounds provided gun powder shell magazine served pair guns individual semi automatic guns carried fitted amidships funnels platform stern rounds carried rounds ready use boxes near gun guns elevate fired shells muzzle velocity effective anti aircraft range meters guns pair stern removed shortly commissioned obsolete hotchkiss machine guns carried twin mounts mounts bridge atop boiler room housing forward mainmast rounds provided removed shortly commissioned designed carry mines space extra total carried deck deck system rails sides ship moved chain drives pair rails forward end rails transverse spur connected spur facilitated loading mines ship allowed mines moved rails rails ended ramps stern ship sloped angle minimize shock impact mines released chain drive smaller mines carried service entered service experienced problems particularly machinery shortly commissioned navy decided extra role gunnery training ship entered toulon dockyard necessary modifications october quarters men added deck guns machine guns replaced caliber guns hotchkiss machine guns twin mounts mounts guns mounted funnels guns maximum depression maximum elevation fired kilogram shell muzzle velocity rate fire rounds minute maximum effective ceiling hotchkiss guns rate fire rounds minute practical rate rounds minute allow round magazines theoretical ceiling simple fire control director added guns additional installed use spent dockyard hands finishing round modifications april refitted times period add gunnery equipment defects included reinforcement superstructure damaged muzzle blast guns replacement aluminum steel ones high angle fire control director guns added gun converted powered remotely controlled mounts gun shields added guns protect crews blast facilities men installed deck experimental twin gun mount gun shield added starboard guns added bring total boilers repaired refit november march later year major refit involved repair turbines replacement fire control director type long tons light cruisers transfer machine guns positions forward refit november february boilers enclosed director protect weather improved remote control guns added gun shields twin mounts transferred french_navy formed controlled training ships planned convert time training ship consort training cruiser arc june renamed time reserved warfare ships french_navy war approached decided retain extra fire control equipment removed transferred brest reorganization sailed french morocco september mines embarked ordered lay defensive minefield september order rescinded day mines ship ordered mines landing mines september exploded destroying ship killing people crewmen injured significant damage caused flying debris gun armor salvaged war demolition work begin october completed july
French minelaying cruiser Pluton