Notable changes:
- Overhauled ship definition, dreadnought hull is called super dreadnought, panzerschiff is revived armored cruiser, heavy/light cruiser is no more, instead they are cruiser and escort cruiser.
- Conversion battleship carrier now has access to an extra deck space slot, carrying up to 80 planes maximum.
- Added fuel buff for player and AI by -15% consumption, it's integrated with normal difficulty.
- Removed annoying xxx ship hull text in fleet view, it's just the class name instead.
- Reworked fleet in exile decision for Britain, now ships are really transferred from Canada and Australia, and Britain will get around 90 ships.

Updates:
- Overhauled submarine and panzerschiff icon for Russia
- Added back Australasian and Great Britain icons(using Canadian copies)
- Added light cruiser and coastal defense ship icon for Netherlands
- Added a few cruiser icons for Ottoman
- Added a few battleship and destroyer icons for Ukraine
- Added a few cruiser icon for Qing
- A new icon for US standard battleship
- Buff German East Asia fleet by around 5 light cruisers and 20 destroyers
- Fixed known bugs of naval redistribution in ACW
- Reworked cruiser and battleship description
- Fixed Argentina has no ship variants
- Fixed Baltic Duchy has no ship variants
- Bring back ship name lists in 0.21 to avoid naming mismatches