• +
• 

  Main Armaments Modification 1
  Risk of main battery becoming incapacitated	-20 %
  Main battery survivability	+50 %
  Main battery repair time	-20 %
  Risk of torpedo tubes becoming incapacitated	-20 %
  Torpedo tubes survivability	+50 %
  Torpedo tubes repair time	-20 %

• 

  Auxiliary Armaments Modification 1
  Secondary battery survivability	+100 %
  AA mount survivability	+100 %

• 

  Magazine Modification 1
  Risk of your ship's magazine detonating	-70 %

• 

  Damage Control Party Modification 1
  Increases the action time of the Damage Control Party and Fast Damage Control Team consumables.
  Consumable action time	+40 %

• +
• 

  Damage Control System Modification 1
  Risk of catching fire	-5 %
  Risk of flooding	-3 %

• 

  Engine Room Protection
  Risk of engine becoming incapacitated	-20 %
  Engine repair time	-20 %
  Risk of steering gears becoming incapacitated	-20 %
  Steering gears repair time	-20 %

• +
• 

  Main Battery Modification 2
  Main battery traverse speed	+15 %
  Main battery traverse speed	+15 %
  Main battery traverse speed	+15 %

• 

  Secondary Battery Modification 1
  Maximum secondary battery shell dispersion	-20 %
  Secondary battery firing range	+20 %

• 

  AA Guns Modification 1
  Priority AA sector preparation time	-20 %

• 

  Aiming Systems Modification 1
  Maximum main battery shell dispersion	-7 %
  Maximum secondary battery shell dispersion	-5 %
  Secondary battery firing range	+5 %
  Torpedo tubes traverse speed	+20 %

• +
• 

  Damage Control System Modification 2
  Fire extinguishing time	-15 %
  Flooding recovery time	-15 %

• 

  Propulsion Modification 1
  Reduces time to full speed
  Time taken to reach full engine power when accelerating	-50 %

• 

  Steering Gears Modification 1
  Rudder shift time	-20 %

• 

  Airstrike Modification 1
  Depth charge damage	+15 %
  Depth charge damage	+15 %
  Depth charge damage	+15 %
  Depth charge damage	+15 %
  Airstrike armament reload time	-20 %
  Airstrike aircraft HP	+25 %

• +
• 

  Torpedo Lookout System
  Assured acquisition range of torpedoes	1.8 km

• 

  Concealment System Modification 1
  Dispersion of shells fired by enemies attacking your ship	+5 %
  Ship's detectability range	-10 %
  Ship's detectability range	-10 %
  Ship's detectability range	-10 %
  Ship's detectability range	-10 %
  Squadron detectability range	-10 %
  Ship detectability for submarines when underwater	-10 %

• 

  Ship Consumables Modification 1
  Consumable action time	+10 %