v2.4 "Ironbottom Sound"

Notable Changes:
-New Icons: Yamato (1965), Chen Hai, Andrea Doria (1926), Colbert (Missile Refit), Queen Elizabeth (1941)
-New Role: Escort Carrier
-Add decisions to enable expert AI in mid-game.
-Squad size of CV planes on land is reduced to 10 to help AI reinforce its carriers more quickly.
-Rework armor-piercing vs damage array to balance light guns' effects on heavy ships.
-Greatly increase rate of damaged citical parts when critical hits take place.
-Add a bunch of pictures to hover popups of naval techs.

Updates:
-Andrea Dorias are in active service now, and reverted back to WWI armaments to reflect their status in 1936.
-Cruiser Bolzano now uses tier-3 hull.
-Admiral Hipper class now owns extra armor module.
-Japan now starts with sonar.
-A new academy spirit for Russia.
-Lower organisation damage factor of CV planes.
-Delay between two air raids is reverted back to 3 hours.
-Rework bonus and penalty from experience and screen efficiency.
-Civilian material is mandatory on merchant carrier.
-Some carrier techs can also provide air breakthrough points.
-Minor country's naval production AI only checks fleet size instead of dockyards.
-Update AI buffs with dockyard building speed and design cost reduction.
-Radar and mast are made exclusive from each other.
-Add a destroyer output boost to AI to balance its multi-purpose destroyer design.
-Reduce cost of submarine hulls and pressure hull modules.
-Tune effects of some carrier modules.
-Airplane launcher brings visibility penalty.
-AI will update its tech when player is rushing naval techs when auto unlock mode is on.

Fixes:
-Revert xp gain factor from 0.1 to 0.8.
-Germany can have access to its WWI destroyer icons.
-Fixed some major countries can use naval development decisions.
-Fixed bunker cap not working.

-Fixed a major bug that AI won't use expert aircraft designs

v2.3.1

Update：
-AI will put dive bombers on carrier
-Add battleship anti-air and escort carrier to AI auto tech unlock process
-Add AI strategy to update their interwar CV planes
-Add AI strategy to Germany to avoid Mediterranean
-Update AI expert CV plane templates with protection modules
-Rationalize cost of cruiser guns
-Ban secondary island on escort carriers

Fixes:
-Fixed some wrong text about org bonus

v2.3 "Eastern Solomons"

Notable Changes:
-Rework all doctrine dependencies, now doctrines require certain techs researched to unlock.
-Introduce a new HP model on all types of guns (except light and DP) that aligns with hull HP and ends HP farming on empty hulls.
-Introduce a cost model that dynamically adjust cost of turret based on how many turrets in presence.
-Improve AI performance of USA, UK, and Japan in the Pacific War.
-New Roles: Armored Ship, Large Cruiser (for PZ)

Updates:
-Increase light gun hit profile from 45 to 55.
-Retreat speed is much faster to simulate realistic disengagement.
-Add a modifier providing higher torpedo penetration bonus to night combat.
-Add terrain modifiers to super heavy battleship and capital fleet cruiser.
-Improve damage and disruption factor of CV fighters.
-Update AI's desire to upgrade existing ship and CV plane designs.
-Increase AI's desire to update and build more submarines.
-Update AI's carrier templates to use open hangars on early designs, and armored on late ones.
-Rework HP and AA bonus on all types of hangars.
-Basic carrier tech has dependency on landing aid and arrest gear.
-CV planes will always target carriers regardless of all other factors.
-Armor scheme and torpedo defense system are no longer allowed on arsenal ship.
-AWACS can boost detection of all installed detecting modules.
-Major countries don't have access to naval development decisions anymore.
-Max positioning penalty from deathstacking is raised to 150%, taking effects when fleet size is over 65.
-Move bulbous bow sonar to advanced sonar tech.
-Add year dependency to damage control techs.
-Tune effects of some carrier techs.
-Allow Germany to use its WWI ship icons.
-Rework some tech and module icons.
-Update effects of carrier modules, with more specific tips about their impacts on organisation.

Fixes:
-Fixed carrier being able to have two civilian material modules simultaneously.
-Fixed secondary island and no-island design being able to be installed together.

v2.2 "Midway"

Notable Changes:
-Rework all Roman Numerals on module icons to align with vanilla style.
-Add an easter egg of Kantai Collection.
-New Modules: Light Battery with RAT Launchers, Tier V DP Secondaries
-New Icons: Midway (SCB-110), Nautilus (SSN-571), Type IX, Type XB, Project 611 (Zulu), Project 658 (Hotel)
-Add an angled deck topview to carrier in ship designer.

Updates:
-Cruiser and destroyer now have access to three electronic devices at the same time.
-Rebalance effects of all torpedo modules.
-Cold-war torpedo has anti-submarine capabilities now.
-Diesel engines will improve reliability and range.
-Civilian engines have better range bonus.
-Late light medium guns now have higher speed and reliability penalty.
-Countries with post-war heavy hull now have fuel boiler unlocked by default.
-Partially remove dive bomber variant for advanced AI since it's too difficult for it to manage.
-Carrier post 1940 has extra access to miscellaneous modules.
-Buff effects from AWACS.
-Reduce supply consumption of capital ships.
-Add more unique names for cold-war DP guns.
-Update AI battleship templates.
-Rework module icon of decoy launcher.
-Rework module icon of tier-4 sonar.
-Symmetric Key Algorithm technology is renamed as Cryptography Revolution, and also reduces army and airforce intel to others now.
-Memory Expansion technology is renamed as Arrayed Magnetic Core Memory.
-Rework tech icon of landing aid system and arrayed magnetic core memory.
-Tier 3 and 4 BC armor will cause higher speed penalty.
-Nerf effects of dive bomber study.
-Anechoic tile costs 1 rubber now.
-Structural aluminum is not allowed to coexist with cruiser armor.

Fixes:
-Fixed carrier heavy armor can't be automatically upgraded.
-Fixed missing secondaries topviews on cruiser hull.
-Fixed small hangar missing on carrier hull topview.
-Fixed improved twin super heavy gun has higher reliability penalty.
-Fixed underway replenishment missing loc about prototype rewards.
-Improve writing of some tech description.

-Fixed some missing loc

v2.1 "Coral Sea"

Notable Changes:
-New Modules: Coldwar Battleship Upgrade, Coldwar Carrier Upgrade
-New Roles: Fleet Carrier, Light Carrier
-Rework effects of admiral skills and traits.
-Add MIO to naval production lines of all major countries.
-Add a rule to enable better AI CV plane templates (default off).

Updates:
-Rework all light and heavy engine icons.
-Add high dismantle cost to all inflexible roles so that they are no longer worth the conversion.
-Add tips to all inflexible roles.
-Update starting light carrier variants.
-French Bourrasque-class is re-classified as post-war hull.
-Add Le Hardi-class destroyer template to France.
-Light carrier now has access to cruiser engines.
-1944 carrier can no longer be converted to super carrier, it uses coldwar upgrade module instead.
-Reduce reliability of all cruiser hulls and full missile layout.
-Buff submarine retreat speed and reveal factor.
-Max positioning penalty from deathstacking is raised to 100%.
-Armored ship's starting armor is reduced to 5.
-Armored ship tech now requires post-war heavy hull as its dependency.
-Super carrier now has armored flight deck by default.
-Super carrier side armor can be upgraded from heavy carrier armor IV.
-Nerf effects of secondary carrier island.
-Balance effects of all heavy medium guns.

Fixes:
-Fixed superheater and extra armor modules has no GUI category.
-Fixed some typos in guide.