Naval Technology of the Republic

[snip]

Green: Researched and Active
Red: Researching
White: Unknown

Baseline Levels

Naval Artillery
Baseline: Muzzle-Loading cannon. Primitive Breechloaders. Solid Shot. Primitive High Explosive Shells
1880: Breach loading guns. High Explosive Shells.
1895: Quick-Firing guns. Semi-Armor Piercing Shells
1900: Smokeless Powder.
1905: Improved Smokeless Powder. Armor Piercing Shells
1910: Capped Shells
1915: Shells can be 10% over SS default
1920: Improved Capped Shells Shells can be 20% over SS default
1925: Advanced Capped Shells

Naval Propulsion:
Baseline: Simple Reciprocating Engines
1895: Complex Reciprocating Engines, Oil Spraying up to 10% of bunkerage.
1902: Turbines, Underway Recoaling
1906: Electric Drives, Oil Fired Boilers
1909: Hydraulic Drives
1912: Geared Drives
1915: Diesel Engines
1918: Underway Oiling

Capital Ship Architecture:
Baseline: Main guns in twin turrets, secondaries in casemate, tertiary in casemate or deck mounts.
1891: Mixed-caliber main battery (Main+intermediary calibers), Superfiring secondaries (Restricted Axial Firing Arcs) and Stacked Main Battery turrets OR Main caliber battery in AQY. [Pick One Only]
1903: All-big-gun ship with wing turrets OR Superfiring turrets (restricted axial firing arcs) [Pick one or both]
1905: Improved turret hydraulics, independent gun elevation, Torpedo Bulkheads, triple turrets
1910: Superfiring turrets (unrestricted firing arcs), "All or Nothing" Protective Schemes, "Pair of Twins" Quadruple turrets
1914: True Quadruple turrets, Sloped external belts
1920:  No restriction (high or low) on caliber of turreted guns
1926: Primitive DP secondary batteries
1932: Improved DP Secondary batteries. De-Capping plates
1940: Advanced DP Secondary batteries.
1946: Automatic Secondary Guns

Aircraft/Seaplane Carrier Architecture:
Baseline: None
1910: Experimental aviation ships. Requires and is automatically granted upon completion of the 1910 Aircraft tech.
1915: floatplanes; flying-off decks for wheeled aircraft. Primitive Air-Launched torpedoes
1918: gunpowder catapults for floatplanes; separate landing and taking-off decks for wheeled aircraft. Early Air-Launched torpedoes. Rapid Consecutive Takeoffs limited to single aircraft.
1922: hydraulic catapults; full length decks for wheeled aircraft; arrestor wires. Primitive Anti-Shipping Bombs. Rapid Consecutive Takeoffs limited to single squadrons
1924: Improved airgroup handling practices. Primitive deck parks. Anti-Ship Level Bombing. Rapid Consecutive Takeoffs with no more than 25% of the airgroup
1928: armored box carrier Improved Air-Launched Torpedoes. Early Anti-Ship Dive Bombs
1932: Early Deck-Parks, Rapid Consecutive Takeoffs with no more than 50% of the airgroup
1938: Improved Anti-Ship Dive Bombs, Improved deck parks and hanger ventilation. Rapid Consecutive Takeoffs with no more than 75% of the airgroup
1942: Advanced Deck Parks. Advanced Air-Launched Torpedoes. Advanced Anti-Ship Dive Bombs. Rapid Consecutive Takeoffs with 100% of the airgroup.

Cruiser Architecture:
Baseline: guns in single mounts or casemates, on side/centerline
1900: ammunition hoists, deck torpedo armament, superfiring mounts. Cruisers under 6000 tons may have cross-sectional hull strength > 0.9
1910: twin gun mounts (require hoists); powered gun mounts; unrestricted weapon armor
1920:  No restriction (high or low) on caliber of turreted guns. Cruisers under 3000 tons may have cross-sectional hull strength > 0.75

Destroyer, Torpedo Boat, and Motor Torpedo Boat Architecture:
Baseline: single TTs - max 4, displacement 500t
1904: double TTs - max 8, displacement 750t Type A MTB
1908: triple TTs - max 12, displacement 1000t Type B MTB
1912: max displacement 1500t Type C, D MTB
1918: quad TTs, 2000t Type E, F MTB
1924: quintuple tubes, 2,500t Type G, H MTB
1928: Type H, I, J MTB

Mine Warfare:
Baseline: Hand detonated mines. Running into mines with ships.
1897: Primitive Horn Mines
1900: Reliable Horn mines. Primitive paravanes and dragged booms behind small vessels.
1908: Early antenna mines. Advanced paravanes, active charges.
1918: Reliable antenna mines.
1922: Unreliable magnetic mines & countermeasures.

Night Fighting:
Baseline: Mk1 Eyeball, standard searchlights in regular mountings.
1908: Basic tactics, Specialised nighttime acquisition Searchlight mounts, night scopes
1912: Starshells, Improved tactics
1918: Illuminating shells with parachute, improved night scopes

Rangefinding, Fire Control and Gunnery:
Baseline: Local control of individual guns. Limited non-rangefinding magnification equipment for main batteries. Iron sight aiming. 2km All ships equipped w/o misc weight allocation.
1905: Continuous Aim Systems. Short-base rangefinders. Dedicated Spotting infrastructure. Primitive centralization. 6km
1908: Centralized FC, early directors - 10km
1912: Primitive FC computers -14km
1918: Spotting planes, Central director stations, long base-length RF - 24km
1930:  Electromechanical FC computers - 30km

Remote Sensing Devices:
Baseline: Mk1 Eyeball with limited optical enhancement (eg Binoculars)
1905: Early Huelsmeyer-type "radar", listening dishes, War tuba's.
1915: refined Huelsmeyer-type "radar"
1930: Primitive search RADAR

Torpedo Technologies:
Baseline: Spar mounted Torpedo, Primitive Self-Propelled Torpedoes with improvised warheads.
1890: Early Self-Propelled Torpedoes with Compressed Air engines. Primitive warheads. Early contact fuses.
1899: Early Wet Heater engines Early warheads.
1905: Improved Wet Heater engines. Improved fuses
1908: Improved warheads
1913: Advanced Wet Heater engines
1918: Advanced warheads. Advanced contact fuses.
1928: Early Oxygen Torpedoes. Primitive magnetic firing pistols.
1935: Improved Oxygen Torpedoes. Early magnetic firing pistols.
1940: Advanced Oxygen Torpedoes. Improved Magnetic firing pistols. Primitive programmable paths.
1945: Advanced magnetic firing pistols. Early programmable paths. Primitive remote guidance methods.

Submarines and Countermeasures:
1900
1905
1910
1915
1920
1925
1930
1935
1940

[snip]

Green: Researched and Active
Red: Researching
White: Unknown

Naval Artillery
Baseline: Muzzle-Loading cannon. Primitive Breechloaders. Solid Shot. Primitive High Explosive Shells
1880: Breach loading guns. High Explosive Shells.
1895: Quick-Firing guns. Semi-Armor Piercing Shells
1900: Smokeless Powder.
1905: Improved Smokeless Powder. Armor Piercing Shells
1910: Capped Shells
1915: Shells can be 10% over SS default
1920: Improved Capped Shells Shells can be 20% over SS default
1925: Advanced Capped Shells

Naval Propulsion:
Baseline: Simple Reciprocating Engines
1895: Complex Reciprocating Engines, Oil Spraying up to 10% of bunkerage.
1902: Turbines, Underway Recoaling
1906: Electric Drives, Oil Fired Boilers
1909: Hydraulic Drives
1912: Geared Drives
1915: Diesel Engines
1918: Underway Oiling

Capital Ship Architecture:
Baseline: Main guns in twin turrets, secondaries in casemate, tertiary in casemate or deck mounts.
1891: Mixed-caliber main battery (Main+intermediary calibers), Superfiring secondaries (Restricted Axial Firing Arcs) and Stacked Main Battery turrets OR Main caliber battery in AQY. [Pick One Only]
1903: All-big-gun ship with wing turrets OR Superfiring turrets (restricted axial firing arcs) [Pick one or both]
1905: Improved turret hydraulics, independent gun elevation, Torpedo Bulkheads, triple turrets
1910: Superfiring turrets (unrestricted firing arcs), "All or Nothing" Protective Schemes, "Pair of Twins" Quadruple turrets
1914: True Quadruple turrets, Sloped external belts
1920:  No restriction (high or low) on caliber of turreted guns
1926: Primitive DP secondary batteries
1932: Improved DP Secondary batteries. De-Capping plates
1940: Advanced DP Secondary batteries.
1946: Automatic Secondary Guns

Aircraft/Seaplane Carrier Architecture:
Baseline: None
1910: Experimental aviation ships. Requires and is automatically granted upon completion of the 1910 Aircraft tech.
1915: floatplanes; flying-off decks for wheeled aircraft. Primitive Air-Launched torpedoes
1918: gunpowder catapults for floatplanes; separate landing and taking-off decks for wheeled aircraft. Early Air-Launched torpedoes. Rapid Consecutive Takeoffs limited to single aircraft.
1922: hydraulic catapults; full length decks for wheeled aircraft; arrestor wires. Primitive Anti-Shipping Bombs. Rapid Consecutive Takeoffs limited to single squadrons
1924: Improved airgroup handling practices. Primitive deck parks. Anti-Ship Level Bombing. Rapid Consecutive Takeoffs with no more than 25% of the airgroup
1928: armored box carrier Improved Air-Launched Torpedoes. Early Anti-Ship Dive Bombs
1932: Early Deck-Parks, Rapid Consecutive Takeoffs with no more than 50% of the airgroup
1938: Improved Anti-Ship Dive Bombs, Improved deck parks and hanger ventilation. Rapid Consecutive Takeoffs with no more than 75% of the airgroup
1942: Advanced Deck Parks. Advanced Air-Launched Torpedoes. Advanced Anti-Ship Dive Bombs. Rapid Consecutive Takeoffs with 100% of the airgroup.

Cruiser Architecture:
Baseline: guns in single mounts or casemates, on side/centerline
1900: ammunition hoists, deck torpedo armament, superfiring mounts. Cruisers under 6000 tons may have cross-sectional hull strength > 0.9
1910: twin gun mounts (require hoists); powered gun mounts; unrestricted weapon armor
1920:  No restriction (high or low) on caliber of turreted guns. Cruisers under 3000 tons may have cross-sectional hull strength > 0.75

Destroyer, Torpedo Boat, and Motor Torpedo Boat Architecture:
Baseline: single TTs - max 4, displacement 500t
1904: double TTs - max 8, displacement 750t Type A MTB
1908: triple TTs - max 12, displacement 1000t Type B MTB
1912: max displacement 1500t Type C, D MTB
1918: quad TTs, 2000t Type E, F MTB
1924: quintuple tubes, 2,500t Type G, H MTB
1928: Type H, I, J MTB

Mine Warfare:
Baseline: Hand detonated mines. Running into mines with ships.
1897: Primitive Horn Mines
1900: Reliable Horn mines. Primitive paravanes and dragged booms behind small vessels.
1908: Early antenna mines. Advanced paravanes, active charges.
1918: Reliable antenna mines.
1922: Unreliable magnetic mines & countermeasures.

Night Fighting:
Baseline: Mk1 Eyeball, standard searchlights in regular mountings.
1908: Basic tactics, Specialised nighttime acquisition Searchlight mounts, night scopes
1912: Starshells, Improved tactics
1918: Illuminating shells with parachute, improved night scopes

Rangefinding, Fire Control and Gunnery:
Baseline: Local control of individual guns. Limited non-rangefinding magnification equipment for main batteries. Iron sight aiming. 2km All ships equipped w/o misc weight allocation.
1905: Continuous Aim Systems. Short-base rangefinders. Dedicated Spotting infrastructure. Primitive centralization. 6km
1908: Centralized FC, early directors - 10km
1912: Primitive FC computers -14km
1918: Spotting planes, Central director stations, long base-length RF - 24km
1930:  Electromechanical FC computers - 30km

Remote Sensing Devices:
Baseline: Mk1 Eyeball with limited optical enhancement (eg Binoculars)
1905: Early Huelsmeyer-type "radar", listening dishes, War tuba's.
1915: refined Huelsmeyer-type "radar"
1930: Primitive search RADAR

Torpedo Technologies:
Baseline: Spar mounted Torpedo, Primitive Self-Propelled Torpedoes with improvised warheads.
1890: Early Self-Propelled Torpedoes with Compressed Air engines. Primitive warheads. Early contact fuses.
1899: Early Wet Heater engines Early warheads.
1905: Improved Wet Heater engines. Improved fuses
1908: Improved warheads
1913: Advanced Wet Heater engines
1918: Advanced warheads. Advanced contact fuses.
1928: Early Oxygen Torpedoes. Primitive magnetic firing pistols.
1935: Improved Oxygen Torpedoes. Early magnetic firing pistols.
1940: Advanced Oxygen Torpedoes. Improved Magnetic firing pistols. Primitive programmable paths.
1945: Advanced magnetic firing pistols. Early programmable paths. Primitive remote guidance methods.

Submarines and Countermeasures:
1900
1905
1910
1915
1920
1925
1930
1935
1940
[/quote]

[snip]

Green: Researched and Active
Red: Researching
White: Unknown

Naval Artillery
Baseline: Muzzle-Loading cannon. Primitive Breechloaders. Solid Shot. Primitive High Explosive Shells
1880: Breach loading guns. High Explosive Shells.
1895: Quick-Firing guns. Semi-Armor Piercing Shells
1900: Smokeless Powder.
1905: Improved Smokeless Powder. Armor Piercing Shells
1910: Capped Shells
1915: Shells can be 10% over SS default
1920: Improved Capped Shells Shells can be 20% over SS default
1925: Advanced Capped Shells

Naval Propulsion:
Baseline: Simple Reciprocating Engines
1895: Complex Reciprocating Engines, Oil Spraying up to 10% of bunkerage.
1902: Turbines, Underway Recoaling
1906: Electric Drives, Oil Fired Boilers
1909: Hydraulic Drives
1912: Geared Drives
1915: Diesel Engines
1918: Underway Oiling

Capital Ship Architecture:
Baseline: Main guns in twin turrets, secondaries in casemate, tertiary in casemate or deck mounts.
1891: Mixed-caliber main battery (Main+intermediary calibers), Superfiring secondaries (Restricted Axial Firing Arcs) and Stacked Main Battery turrets OR Main caliber battery in AQY. [Pick One Only]
1903: All-big-gun ship with wing turrets OR Superfiring turrets (restricted axial firing arcs) [Pick one or both]
1905: Improved turret hydraulics, independent gun elevation, Torpedo Bulkheads, triple turrets
1910: Superfiring turrets (unrestricted firing arcs), "All or Nothing" Protective Schemes, "Pair of Twins" Quadruple turrets
1914: True Quadruple turrets, Sloped external belts
1920:  No restriction (high or low) on caliber of turreted guns
1926: Primitive DP secondary batteries
1932: Improved DP Secondary batteries. De-Capping plates
1940: Advanced DP Secondary batteries.
1946: Automatic Secondary Guns

Aircraft/Seaplane Carrier Architecture:
Baseline: None
1910: Experimental aviation ships. Requires and is automatically granted upon completion of the 1910 Aircraft tech.
1915: floatplanes; flying-off decks for wheeled aircraft. Primitive Air-Launched torpedoes
1918: gunpowder catapults for floatplanes; separate landing and taking-off decks for wheeled aircraft. Early Air-Launched torpedoes. Rapid Consecutive Takeoffs limited to single aircraft.
1922: hydraulic catapults; full length decks for wheeled aircraft; arrestor wires. Primitive Anti-Shipping Bombs. Rapid Consecutive Takeoffs limited to single squadrons
1924: Improved airgroup handling practices. Primitive deck parks. Anti-Ship Level Bombing. Rapid Consecutive Takeoffs with no more than 25% of the airgroup
1928: armored box carrier Improved Air-Launched Torpedoes. Early Anti-Ship Dive Bombs
1932: Early Deck-Parks, Rapid Consecutive Takeoffs with no more than 50% of the airgroup
1938: Improved Anti-Ship Dive Bombs, Improved deck parks and hanger ventilation. Rapid Consecutive Takeoffs with no more than 75% of the airgroup
1942: Advanced Deck Parks. Advanced Air-Launched Torpedoes. Advanced Anti-Ship Dive Bombs. Rapid Consecutive Takeoffs with 100% of the airgroup.

Cruiser Architecture: For all years, Cruisers with turrets shall have a composite hull strength > 1.0.
Baseline: guns in single mounts or casemates, on side/centerline
1900: ammunition hoists, deck torpedo armament, superfiring mounts. Cruisers under 6000 tons may have composite hull strength > 0.90
1910: twin gun mounts (require hoists); powered gun mounts; unrestricted weapon armor
1920:  No restriction (high or low) on caliber of turreted guns. Cruisers under 3000 tons may have composite hull strength > 0.75, Cruisers under 8000 tons may have composite hull strength >0.90

Destroyer, Torpedo Boat, and Motor Torpedo Boat Architecture:
Baseline: single TTs - max 4, displacement 500t
1904: double TTs - max 8, displacement 750t Type A MTB
1908: triple TTs - max 12, displacement 1000t Type B MTB
1912: max displacement 1500t Type C, D MTB
1918: quad TTs, 2000t Type E, F MTB
1924: quintuple tubes, 2,500t Type G, H MTB
1928: Type H, I, J MTB

Mine Warfare:
Baseline: Hand detonated mines. Running into mines with ships.
1897: Primitive Horn Mines
1900: Reliable Horn mines. Primitive paravanes and dragged booms behind small vessels.
1908: Early antenna mines. Advanced paravanes, active charges.
1918: Reliable antenna mines.
1922: Unreliable magnetic mines & countermeasures.

Night Fighting & Remote Sensing Devices:
Baseline: Mk1 Eyeball with limited optical enhancement (eg Binoculars), standard searchlights in regular mountings.
1905: Early Huelsmeyer-type "radar", listening dishes, War tuba's.
1908: Basic tactics, Specialized nighttime acquisition Searchlight mounts, night scopes
1912: Starshells, Improved tactics
1918: Illuminating shells with parachute, improved night scopes
1922: refined Huelsmeyer-type "radar". Short range directional indicator.  Magnetron Research.
1930: Primitive search RADAR. Large and crude. Long range airborne directional indicator.
1934: Improved search RADAR. These would be the first shipboard mounts.
1938: Functional Air & Surface RADAR, Proximity fuses 125mm+
1942: Airborne radars. Limited Night blindfire Fire control RADAR
1946: Full Night blindfire RADAR, Proximity fuses 75mm+


Rangefinding, Fire Control and Gunnery:
Baseline: Local control of individual guns. Limited non-rangefinding magnification equipment for main batteries. Iron sight aiming. 2km All ships equipped w/o misc weight allocation.
1905: Continuous Aim Systems. Short-base rangefinders. Dedicated Spotting infrastructure. Primitive centralization. 6km
1908: Centralized FC, early directors - 10km
1912: Primitive FC computers -14km
1918: Spotting planes, Central director stations, long base-length RF - 24km
1930:  Electromechanical FC computers - 30km

Torpedo Technologies:
Baseline: Spar mounted Torpedo, Primitive Self-Propelled Torpedoes with improvised warheads.
1890: Early Self-Propelled Torpedoes with Compressed Air engines. Primitive warheads. Early contact fuses.
1899: Early Wet Heater engines Early warheads.
1905: Improved Wet Heater engines. Improved fuses
1908: Improved warheads
1913: Advanced Wet Heater engines
1918: Advanced warheads. Advanced contact fuses.
1928: Early Oxygen Torpedoes. Primitive magnetic firing pistols.
1935: Improved Oxygen Torpedoes. Early magnetic firing pistols.
1940: Advanced Oxygen Torpedoes. Improved Magnetic firing pistols. Primitive programmable paths.
1945: Advanced magnetic firing pistols. Early programmable paths. Primitive remote guidance methods.

Submarines and Countermeasures:
1900
1905
1910
1915
1920
1925
1930
1935
1940

Note: Updated 6/29/20 for Tech Revisions

[snip]

Green: Researched and Active
Red: Researching
White: Unknown

As of 1915H1

Naval Artillery
Baseline: Muzzle-Loading cannon. Primitive Breechloaders. Solid Shot. Primitive High Explosive Shells
1880: Breach loading guns. High Explosive Shells.
1895: Quick-Firing guns. Semi-Armor Piercing Shells
1900: Smokeless Powder.
1905: Improved Smokeless Powder. Armor Piercing Shells
1910: Capped Shells
1915: Shells can be 10% over SS default
1920: Improved Capped Shells Shells can be 20% over SS default
1925: Advanced Capped Shells

Naval Propulsion:
Baseline: Simple Reciprocating Engines
1895: Complex Reciprocating Engines, Oil Spraying up to 10% of bunkerage.
1902: Turbines, Underway Recoaling
1906: Electric Drives, Oil Fired Boilers
1909: Hydraulic Drives
1912: Geared Drives
1915: Diesel Engines
1918: Underway Oiling

Capital Ship Architecture:
Baseline: Main guns in twin turrets, secondaries in casemate, tertiary in casemate or deck mounts.
1891: Mixed-caliber main battery (Main+intermediary calibers), Superfiring secondaries (Restricted Axial Firing Arcs) and Stacked Main Battery turrets OR Main caliber battery in AQY. [Pick One Only]
1903: All-big-gun ship with wing turrets OR Superfiring turrets (restricted axial firing arcs) [Pick one or both]
1905: Improved turret hydraulics, independent gun elevation, Torpedo Bulkheads, triple turrets
1910: Superfiring turrets (unrestricted firing arcs), "All or Nothing" Protective Schemes, "Pair of Twins" Quadruple turrets
1914: True Quadruple turrets, Sloped external belts
1920:  No restriction (high or low) on caliber of turreted guns
1926: Primitive DP secondary batteries
1932: Improved DP Secondary batteries. De-Capping plates
1940: Advanced DP Secondary batteries.
1946: Automatic Secondary Guns

Aircraft/Seaplane Carrier Architecture:
Baseline: None
1910: Experimental aviation ships. Requires and is automatically granted upon completion of the 1910 Aircraft tech.
1915: floatplanes; flying-off decks for wheeled aircraft. Primitive Air-Launched torpedoes
1918: gunpowder catapults for floatplanes; separate landing and taking-off decks for wheeled aircraft. Early Air-Launched torpedoes. Rapid Consecutive Takeoffs limited to single aircraft.
1922: hydraulic catapults; full length decks for wheeled aircraft; arrestor wires. Primitive Anti-Shipping Bombs. Rapid Consecutive Takeoffs limited to single squadrons
1924: Improved airgroup handling practices. Primitive deck parks. Anti-Ship Level Bombing. Rapid Consecutive Takeoffs with no more than 25% of the airgroup
1928: armored box carrier Improved Air-Launched Torpedoes. Early Anti-Ship Dive Bombs
1932: Early Deck-Parks, Rapid Consecutive Takeoffs with no more than 50% of the airgroup
1938: Improved Anti-Ship Dive Bombs, Improved deck parks and hanger ventilation. Rapid Consecutive Takeoffs with no more than 75% of the airgroup
1942: Advanced Deck Parks. Advanced Air-Launched Torpedoes. Advanced Anti-Ship Dive Bombs. Rapid Consecutive Takeoffs with 100% of the airgroup.

Cruiser Architecture: For all years, Cruisers with turrets shall have a composite hull strength > 1.0.
Baseline: guns in single mounts or casemates, on side/centerline
1900: ammunition hoists, deck torpedo armament, superfiring mounts. Cruisers under 6000 tons may have composite hull strength > 0.90
1910: twin gun mounts (require hoists); powered gun mounts; unrestricted weapon armor
1920:  No restriction (high or low) on caliber of turreted guns. Cruisers under 3000 tons may have composite hull strength > 0.75, Cruisers under 8000 tons may have composite hull strength >0.90

Destroyer, Torpedo Boat, and Motor Torpedo Boat Architecture:
Baseline: single TTs - max 4, displacement 500t
1904: double TTs - max 8, displacement 750t Type A MTB
1908: triple TTs - max 12, displacement 1000t Type B MTB
1912: max displacement 1500t Type C, D MTB
1918: quad TTs, 2000t Type E, F MTB
1924: quintuple tubes, 2,500t Type G, H MTB
1928: Type H, I, J MTB

Mine Warfare:
Baseline: Hand detonated mines. Running into mines with ships.
1897: Primitive Horn Mines
1900: Reliable Horn mines. Primitive paravanes and dragged booms behind small vessels.
1908: Early antenna mines. Advanced paravanes, active charges.
1918: Reliable antenna mines.
1922: Unreliable magnetic mines & countermeasures.

Night Fighting & Remote Sensing Devices:
Baseline: Mk1 Eyeball with limited optical enhancement (eg Binoculars), standard searchlights in regular mountings.
1905: Early Huelsmeyer-type "radar", listening dishes, War tuba's.
1908: Basic tactics, Specialized nighttime acquisition Searchlight mounts, night scopes
1912: Starshells, Improved tactics
1918: Illuminating shells with parachute, improved night scopes
1922: refined Huelsmeyer-type "radar". Short range directional indicator.  Magnetron Research.
1930: Primitive search RADAR. Large and crude. Long range airborne directional indicator.
1934: Improved search RADAR. These would be the first shipboard mounts.
1938: Functional Air & Surface RADAR, Proximity fuses 125mm+
1942: Airborne radars. Limited Night blindfire Fire control RADAR
1946: Full Night blindfire RADAR, Proximity fuses 75mm+


Rangefinding, Fire Control and Gunnery:
Baseline: Local control of individual guns. Limited non-rangefinding magnification equipment for main batteries. Iron sight aiming. 2km All ships equipped w/o misc weight allocation.
1905: Continuous Aim Systems. Short-base rangefinders. Dedicated Spotting infrastructure. Primitive centralization. 6km
1908: Centralized FC, early directors - 10km
1912: Primitive FC computers -14km
1918: Spotting planes, Central director stations, long base-length RF - 24km
1930:  Electromechanical FC computers - 30km

Torpedo Technologies:
Baseline: Spar mounted Torpedo, Primitive Self-Propelled Torpedoes with improvised warheads.
1890: Early Self-Propelled Torpedoes with Compressed Air engines. Primitive warheads. Early contact fuses.
1899: Early Wet Heater engines Early warheads.
1905: Improved Wet Heater engines. Improved fuses
1908: Improved warheads
1913: Advanced Wet Heater engines
1918: Advanced warheads. Advanced contact fuses.
1928: Early Oxygen Torpedoes. Primitive magnetic firing pistols.
1935: Improved Oxygen Torpedoes. Early magnetic firing pistols.
1940: Advanced Oxygen Torpedoes. Improved Magnetic firing pistols. Primitive programmable paths.
1945: Advanced magnetic firing pistols. Early programmable paths. Primitive remote guidance methods.

Submarines and Countermeasures:
1900
1905
1910
1915
1920
1925
1930
1935
1940

[snip]

Green: Researched and Active
Red: Researching
White: Unknown

As of 1923H1

Naval Artillery
Baseline: Muzzle-Loading cannon. Primitive Breechloaders. Solid Shot. Primitive High Explosive Shells
1880: Breach loading guns. High Explosive Shells.
1895: Quick-Firing guns. Semi-Armor Piercing Shells
1900: Smokeless Powder.
1905: Improved Smokeless Powder. Armor Piercing Shells
1910: Capped Shells
1915: Shells can be 10% over SS default
1920: Improved Capped Shells Shells can be 20% over SS default
1925: Advanced Capped Shells

Naval Propulsion:
Baseline: Simple Reciprocating Engines
1895: Complex Reciprocating Engines, Oil Spraying up to 10% of bunkerage.
1902: Turbines, Underway Recoaling
1906: Electric Drives, Oil Fired Boilers
1909: Hydraulic Drives
1912: Geared Drives
1915: Diesel Engines
1918: Underway Oiling

Capital Ship Architecture:
Baseline: Main guns in twin turrets, secondaries in casemate, tertiary in casemate or deck mounts.
1891: Mixed-caliber main battery (Main+intermediary calibers), Superfiring secondaries (Restricted Axial Firing Arcs) and Stacked Main Battery turrets OR Main caliber battery in AQY. [Pick One Only]
1903: All-big-gun ship with wing turrets OR Superfiring turrets (restricted axial firing arcs) [Pick one or both]
1905: Improved turret hydraulics, independent gun elevation, Torpedo Bulkheads, triple turrets
1910: Superfiring turrets (unrestricted firing arcs), "All or Nothing" Protective Schemes, "Pair of Twins" Quadruple turrets
1914: True Quadruple turrets, Sloped external belts
1920:  No restriction (high or low) on caliber of turreted guns
1926: Primitive DP secondary batteries
1932: Improved DP Secondary batteries. De-Capping plates
1940: Advanced DP Secondary batteries.
1946: Automatic Secondary Guns

Aircraft/Seaplane Carrier Architecture:
Baseline: None
1910: Experimental aviation ships. Requires and is automatically granted upon completion of the 1910 Aircraft tech.
1915: floatplanes; flying-off decks for wheeled aircraft. Primitive Air-Launched torpedoes
1918: gunpowder catapults for floatplanes; separate landing and taking-off decks for wheeled aircraft. Early Air-Launched torpedoes. Rapid Consecutive Takeoffs limited to single aircraft.
1922: hydraulic catapults; full length decks for wheeled aircraft; arrestor wires. Primitive Anti-Shipping Bombs. Rapid Consecutive Takeoffs limited to single squadrons
1924: Improved airgroup handling practices. Primitive deck parks. Anti-Ship Level Bombing. Rapid Consecutive Takeoffs with no more than 25% of the airgroup
1928: armored box carrier Improved Air-Launched Torpedoes. Early Anti-Ship Dive Bombs
1932: Early Deck-Parks, Rapid Consecutive Takeoffs with no more than 50% of the airgroup
1938: Improved Anti-Ship Dive Bombs, Improved deck parks and hanger ventilation. Rapid Consecutive Takeoffs with no more than 75% of the airgroup
1942: Advanced Deck Parks. Advanced Air-Launched Torpedoes. Advanced Anti-Ship Dive Bombs. Rapid Consecutive Takeoffs with 100% of the airgroup.

Cruiser Architecture: For all years, Cruisers with turrets shall have a composite hull strength > 1.0.
Baseline: guns in single mounts or casemates, on side/centerline
1900: ammunition hoists, deck torpedo armament, superfiring mounts. Cruisers under 6000 tons may have composite hull strength > 0.90
1910: twin gun mounts (require hoists); powered gun mounts; unrestricted weapon armor
1920:  No restriction (high or low) on caliber of turreted guns. Cruisers under 3000 tons may have composite hull strength > 0.75, Cruisers under 8000 tons may have composite hull strength >0.90

Destroyer, Torpedo Boat, and Motor Torpedo Boat Architecture:
Baseline: single TTs - max 4, displacement 500t
1904: double TTs - max 8, displacement 750t Type A MTB
1908: triple TTs - max 12, displacement 1000t Type B MTB
1912: max displacement 1500t Type C, D MTB
1918: quad TTs, 2000t Type E, F MTB
1924: quintuple tubes, 2,500t Type G, H MTB
1928: Type H, I, J MTB

Mine Warfare:
Baseline: Hand detonated mines. Running into mines with ships.
1897: Primitive Horn Mines
1900: Reliable Horn mines. Primitive paravanes and dragged booms behind small vessels.
1908: Early antenna mines. Advanced paravanes, active charges.
1918: Reliable antenna mines.
1922: Unreliable magnetic mines & countermeasures.

Night Fighting & Remote Sensing Devices:
Baseline: Mk1 Eyeball with limited optical enhancement (eg Binoculars), standard searchlights in regular mountings.
1905: Early Huelsmeyer-type "radar", listening dishes, War tuba's.
1908: Basic tactics, Specialized nighttime acquisition Searchlight mounts, night scopes
1912: Starshells, Improved tactics
1918: Illuminating shells with parachute, improved night scopes
1922: refined Huelsmeyer-type "radar". Short range directional indicator.  Magnetron Research.
1930: Primitive search RADAR. Large and crude. Long range airborne directional indicator.
1934: Improved search RADAR. These would be the first shipboard mounts.
1938: Functional Air & Surface RADAR, Proximity fuses 125mm+
1942: Airborne radars. Limited Night blindfire Fire control RADAR
1946: Full Night blindfire RADAR, Proximity fuses 75mm+


Rangefinding, Fire Control and Gunnery:
Baseline: Local control of individual guns. Limited non-rangefinding magnification equipment for main batteries. Iron sight aiming. 2km All ships equipped w/o misc weight allocation.
1905: Continuous Aim Systems. Short-base rangefinders. Dedicated Spotting infrastructure. Primitive centralization. 6km
1908: Centralized FC, early directors - 10km
1912: Primitive FC computers -14km
1918: Spotting planes, Central director stations, long base-length RF - 24km
1930:  Electromechanical FC computers - 30km

Torpedo Technologies:
Baseline: Spar mounted Torpedo, Primitive Self-Propelled Torpedoes with improvised warheads.
1890: Early Self-Propelled Torpedoes with Compressed Air engines. Primitive warheads. Early contact fuses.
1899: Early Wet Heater engines Early warheads.
1905: Improved Wet Heater engines. Improved fuses
1908: Improved warheads
1913: Advanced Wet Heater engines
1918: Advanced warheads. Advanced contact fuses.
1928: Early Oxygen Torpedoes. Primitive magnetic firing pistols.
1935: Improved Oxygen Torpedoes. Early magnetic firing pistols.
1940: Advanced Oxygen Torpedoes. Improved Magnetic firing pistols. Primitive programmable paths.
1945: Advanced magnetic firing pistols. Early programmable paths. Primitive remote guidance methods.

Submarines and Countermeasures:
1900
1905
1910
1915
1920
1925
1930
1935
1940