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- Machinery:
- Improved surface condenser - 1% weight saving on machinery
- Cockburn safety valve - 1% weight saving on machinery
- Side drums - 1% weight saving on machinery
- Preheater - 1% weight saving on machinery
- Steam Turbines - 1% weight saving on machinery
- Small tube boilers I - 1% weight saving on machinery
- Oil firing - Enables oil firing if access to oil
- Economizer - 1% weight saving on machinery
- Small tube boilers II - 1% weight saving on machinery
- Superheater - 1% weight saving on machinery
- Circulation augmenter - 1% weight saving on machinery
- Reduction gears - Increases endurance
- Water wall furnace - 1% weight saving on machinery
- Advanced superheater - 1% weight saving on machinery
- Double reduction gears - 1% weight saving on machinery
- Forced circulation - 1% weight saving on machinery
- Turbo electric drive - 1% weight saving on machinery
- Improved oil burners - 1% weight saving on machinery
- Armor:
- Krupp armour - 1% weight saving on armour
- Face hardening - 1% weight saving on armour
- Quality control - 1% weight saving on armour
- Improved annealing - 1% weight saving on armour
- Krupp Cementit - 1% weight saving on armour
- Quality control II - 1% weight saving on armour
- Improved armour bracing - 1% weight saving on armour
- Improved face hardening - 1% weight saving on armour
- Improved homogenous armour - 1% weight saving on armour
- Inclined armour - 1% weight saving on armour
- Improved armour testing methods - 1% weight saving on armour
- Internal belt - 1% weight saving on armour
- Decapping belt - 1% weight saving on armour
- Advanced face hardening - 1% weight saving on armour
- Hull:
- Improved riveting techniques - 1% weight saving on hull
- High tensile steel - 1% weight saving on hull
- Basic weight control - 1% weight saving on hull
- Longitudinal framing - 1% weight saving on hull
- Improved weight control - 1% weight saving on hull
- Hydraulic riveting - 1% weight saving on hull
- Better steel quality - 1% weight saving on hull
- Improved longitudinal framing - 1% weight saving on hull
- Slender hull girders - 1% weight saving on hull
- Improved design calculations - 1% weight saving on hull
- Weight saving - 1% weight saving on hull
- Partial welding - 1% weight saving on hull
- Lightweight fittings - 1% weight saving on hull
- Hydrodynamic hull form - 1% weight saving on machinery
- Lightweight scantlings - 1% weight saving on hull
- Welded hull - 1% weight saving on hull
- Improved welding - 1% weight saving on hull
- Fire control:
- Coincidence rangefinder - Gradual national accuracy improvement
- 6 ft rangefinder - Gradual national accuracy improvement
- Central firing - Enables central firing as FC system on ships
- Range calculator - Gradual national accuracy improvement
- Control tops - Gradual national accuracy improvement
- Automatic range transmitter - Gradual national accuracy improvement
- 9 ft rangfinder - Gradual national accuracy improvement
- Mechanical fire control computer - Gradual national accuracy improvement
- Stereoscopic rangefinder - Gradual national accuracy improvement
- Plotting table - Gradual national accuracy improvement
- Target designator - Gradual national accuracy improvement
- Director firing - Enables director firing in ships
- 12 ft rangefinder - Gradual national accuracy improvement
- Gyro stabiliser - Gradual national accuracy improvement
- Ladder shooting - Gradual national accuracy improvement
- 15 ft rangefinder - Gradual national accuracy improvement
- Secondary director - Enables directors for secondary battery and for CL
- Improved Director - Enables improved director on ships
- Synthetic fire control computer - Reduces penalty for own ship turning
- Advanced director - Enables advanced director on ships
- Subdivision and damage control:
- Double bottom - Gradual damage control improvement
- Improved subdivision - Gradual damage control improvement
- Torpedo protection I - Enables Torpedo protection I on ships
- High capacity pumps I - Gradual damage control improvement
- Torpedo protection II - Enables Torpedo protection II on ships
- Extended double bottom - Gradual damage control improvement
- High capacity pumps II - Gradual damage control improvement
- Diesel generators - Gradual damage control improvement
- Triple bottom - Gradual damage control improvement
- Improved firefighting equipment - Gradual damage control improvement
- Torpedo protection III - Enables Torpedo protection III on ships
- Torpedo protection IV - Enables Torpedo protection IV on ships
- Improved counterflooding equipment - Gradual damage control improvement
- Non flammable materials - Gradual damage control improvement
- Improved watertight hatches - Gradual damage control improvement
- Turrets and gun mountings:
- Hydraulic recoil - Gradual national ROF improvement
- Power rammers - Gradual national ROF improvement
- Pneumatic recuperator - Gradual national ROF improvement
- Mechanical shell handling - Gradual national ROF improvement
- Improved hoists - Gradual national ROF improvement
- Triple turrets - Enables triple turrets
- Hydraulic rammers - Gradual national ROF improvement
- Reliable power training and elevation - Reduces ROF penalty for guns below 8 inches in turrets
- Improved triple turrets - Eliminates ROF and reliability penalty for triple turrets
- Quadruple turrets - Enables quadruple turrets
- Increased elevation - Enables increased elevation
- Improved power training and elevation - Eliminates ROF penalty for guns below 8 inches in turrets
- Improved Quadruple turrets - Eliminates ROF and reliability penalty for quadruple turrets
- Weight savings in turret fittings - 1% Weight saving on hull
- Ship design:
- Heavy secondary battery - Enables secondary guns heavier than 7 inches in casemates or single turrets
- Medium wing turrets - Enables secondary wing double turrets up to 10 inches calibre
- 3 centreline turrets - Enables 3 centreline main turrets on ships
- Main battery Wing turrets - Enables main battery wing turrets on ships
- Cross deck fire - Enables cross deck fire for staggered wing turrets (positions D & F or E & G)
- Superimposed X turret - Enables superimposed X turret on ships
- 4 centreline turrets - Enables 4 centreline main turrets on ships
- Light cruiser armour configuration - Enables light cruiser armour configuration
- Superimposed B turret - Enables superimposed B turret on ships
- Triple turrets - Enables triple turrets
- 5+ centreline turrets - Enables 5 or more centreline main turrets on ships
- Secondary turrets on BB - Enables secondary guns in turrets on BB
- AON armour - Gives full benefits of all or nothing armour layout (no BE or DE)
- Superimposed turrets on CA - Enables superimposed turrets on CA
- More efficient hull form - 1% weight saving on machinery
- Advanced design calculations - 1% weight saving on hull
- Double gun mounts on DD - Enables double gun mounts on DD
- Double gun mounts on CL - Enables double gun mounts on CL
- Advanced weight saving - 1% weight saving on hull
- AP projectiles:
- Hardened AP penetrator - Gradual AP penetration improvement
- Reliable bursting charges - Enhances damage from penetrating hits
- Capped AP projectiles - Gradual AP penetration improvement
- Improved AP cap - Gradual AP penetration improvement
- Increased oblique penetration ability - Gradual AP penetration improvement
- Improved AP penetrator alloys - Gradual AP penetration improvement
- Stable explosive filler - Enhances damage from penetrating hits
- Ballistic cap - Gradual AP penetration improvement
- Improved shell quality control - Gradual AP penetration improvement
- Heavy shells - Gradual AP penetration improvement
- Improved ballistc cap - Gradual AP penetration improvement
- Advanced penerator alloys - Gradual AP penetration improvement
- Super heavy shells - Gradual AP penetration improvement
- Increased muzzle velocity - Gradual AP penetration improvement
- Light forces and torpedo warfare:
- DD of up to 600 tons displacement - Enables building of DD up to 600 tons displacement
- DD of up to 700 tons displacement - Enables building of DD up to 700 tons displacement
- DD of up to 900t displacement - Enables building of DD up to 900 tons displacement
- Double torpedo tube mount - Enables double torpedo mounts
- DD of up to 1100t displacement - Enables building of DD up to 1100 tons displacement
- Triple torpedo tube mount - Enables triple torpedo mounts
- DD of up to 1500t displacement - Enables building of DD up to 1500 tons displacement
- Above water tubes on CL - Enables above water torpedo mounts on CL
- Superimposed X mount on CL - Enables superimposed X gun mounts on CL
- Superimposed guns on DD - Enables superimposed gun mounts on DD
- Quadruple torpedo tube mount - Enables quadruple torpedo mounts
- Motor torpedo boats - Enables building of MTB squadrons
- Superimposed B mount on CL - Enables superimposed B gun mounts on CL
- Above water tubes on other ships - Enables above water torpedo mounts on all ships
- Torpedo technology:
- Improved hydrostatic valve - Torpedoes now have range@speed 800@25/2000@15
- Reliable pendulum mechanism - Torpedoes now have range@speed 900@28/2500@15
- Gyroscope - Torpedoes now have range@speed 1000@28/3000@15
- Improved compressed air supply - Torpedoes now have range@speed 2000@28/4000@18
- Larger torpedo warheads - Torpedoes do more damage
- Contra rotating propellers - Torpedoes now have range@speed 3000@28/5000@20
- Preheater - Torpedoes now have range@speed 3500@30/7000@22
- Horizontal turbines - Torpedoes now have range@speed 3800@30/8000@25
- Wet heater engine - Torpedoes now have range@speed 4000@33/9000@26
- TNT warhead - Torpedoes do more damage
- Improved gyroscope - Torpedoes now have range@speed 4500@37/10000@27
- Lenghtened torpedoes - Torpedoes now have range@speed 4800@37/10500@27
- Enhanced pressure bottle - Torpedoes now have range@speed 4900@37/11500@27
- Enhanced warhead explosives - Torpedoes do more damage
- Improved wet heater engine - Torpedoes now have range@speed 5000@38/12000@27
- Advanced preheater - Torpedoes now have range@speed 5000@38/13000@27
- Oxygen fuelled torpedoes - Torpedoes now have range@speed 5000@38/18000@27
- Submarines:
- Pressure hull - 5% increase of submarine reliability
- Early coastal submarine - Enables building of coastal submarines
- Periscope - 5% increase of submarine reliability
- Diving planes - 5% increase of submarine reliability
- Coastal submarine - Better operating range for coastal submarines
- Torpedo aiming system - 5% increase of submarine reliability
- Diesel engines - 5% increase of submarine reliability
- Improved diving gear - 5% increase of submarine reliability
- Internal torpedo stowage - 5% increase of submarine reliability
- Medium range submarine - Enables building of medium range submarines
- Improved compressed air supply - 5% increase of submarine reliability
- Minelaying submarine - Enables building of minelaying submarines
- Improved diesel engines - 5% increase of submarine reliability
- Increased battery capacity - 5% increase of submarine reliability
- Improved pressure hull - 5% increase of submarine reliability
- ASW:
- Explosive sweeps - Gradual increase in national ASW capability
- Anti submarine nets - Gradual increase in national ASW capability
- ASW mines - Gradual increase in national ASW capability
- Q-Ships - Gradual increase in national ASW capability
- Hydrostatic pistols - Gradual increase in national ASW capability
- Depth charges - Gradual increase in national ASW capability
- Early hydrophones - Gradual increase in national ASW capability
- Improved depth charges - Gradual increase in national ASW capability
- Convoy system - Reduction in merchant losses to submarines
- Improved depth charge racks - Gradual increase in national ASW capability
- Reliable hydrostatic pistols - Gradual increase in national ASW capability
- K-guns - Gradual increase in national ASW capability
- Explosive shells:
- Lyddite bursting charges - Gradual increase in shell damage
- Safe fuze arming devices - Gradual increase in shell damage
- Improved explosive filler packing - Gradual increase in shell damage
- TNT bursting charges - Gradual increase in shell damage
- Reliable delay fuzes - Increase in AP shell damage
- Quality steel for shells - Gradual increase in HE shell damage
- Base fuzes - Enables SAP ammo
- Improved fuzes - Gradual increase in HE shell damage
- Enhanced high explosive filler - Gradual increase in HE shell damage
- Improved shell wall castings - Gradual increase in HE shell damage
- Improved fuze reliability - Reduced dud rate
- Enhanced explosive filler - Gradual increase in shell damage
- Advanced explosive filler - Gradual increase in shell damage
- Fleet tactics:
- Active mine warfare - Increased use of defensive minefields
- Improved signalling - Makes signalling errors less likely
- Destroyer screen - Enables screen formation for DD
- Scouting force - Enables a separate scouting force with CA and BC
- Mine rails on CL and DD - Enables fitting of mine rails on CL and DD
- Fleet cruising formation - Enables crusing formation in parallel columns for the fleet
- Battle turn away - Enables battle turn away maneuvre
- Effective sigint - Better pre battle enemy strength asessment
- Smoke Floats - Gives light cruisers the ability to launch smoke floats
- Concentration firing - Reduces the penalty for more than one ship firing at the same target
- Advanced signalling - Makes signalling errors less likely
- Shell dyes - Reduces the penalty for more than one ship firing at the same target
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