Update v1.5.0:

Gameplay:
Added the French Richelieu-class battleship and Duguay-Trouin-class cruiser, the Dutch Admiralen-class destroyer and K VIII-class submersible, and the Thai Thonburi-class gunboat, along with the Dutch, Thai, Free French, and Vichy French mini-factions. The player may build ships from a friendly faction if it has no ports of its own.
Critical hit effects no longer escalate damage without the ship taking further hits.
When a convoy resupplies a port, the port will resupply any docked fleets still in need of supplies.
When upgrading a ship set to a crew auto-assignent mode, crew is assigned to any newly-installed systems.
Landed seaplanes are picked up by their home ship at a more lenient distance.
Tweaked campaign AI priorities around targeting fleets and coordinating port attacks.
Campaign AI is more likely to prioritise building warships, over convoys for well-supplied ports.
Ships do not go into reverse when trying to depth charge enemy submersibles.
Submersibles' deck guns must take time to load after resurfacing.
Smoothed out column formation movement, while still keeping movement speed up.
Dive bombers and kamikazes don't adjust their heading mid-dive, once below a certain altitude.

Bug Fixes:
Fixed Tokyo and Yokosuka spawning each other's docked ships.
Surfaced submarines can spot ships at the same distance that other ships can.
Convoy AI won't automatically collect supplies from home ports that aren't set to surplus priority.
Defence fleets in nearby hostile ports no longer panic ports into not repairing.
Port upgrade levels and objectives are correctly reset upon quitting to the main menu and starting a new campaign.
Fixed a bug occasionally pushing fleets into the wrong place when entering combat view.
Dive bombers and torpedo bombers whose flights have an attack order will load into combat view at an appropriate height.
Ship can no longer spawn inland around the port of Saigon.

UI:
Updated Chinese, German, Spanish, and French localisation, and fixed a few English typos.
Added an option to disable enemy aircraft spotting alerts.
Added an option to simplify the worldspace ship UI.
Added buttons, when a squadron is selected, to select all aircraft of a type in that squadron.
The map's position and zoom level is retained on reopening.
Added a button to the flight selection panel to copy weapon payloads to all aircraft of the same class on the same ship or airfield.
Corrected the number of light guns displayed for the Cleveland-class cruiser.
The shipyard screen indicates if guns are dual-purpose.

Modding:
Aircraft may be removed from aircraft definitions without a default fallback plane being created in their place.