[TheGeoff]

New Update: Version 0.23
Download here: http://goo.gl/9lOLz2

Changelog:

• Active pause mode added - you can now give orders while the game is paused. Default key is Left Alt, but this can be changed in keybindings.ini. If you don't like this feature you can turn it off in gameoptions.ini for more of a challenge!
• Crew can now rescue injured comrades. Point at an unconscious crewman and press H - a crewman will run over, drag the unconscious guy to safety then administer first aid.
• Mouse control improved: Almost every control panel is now clickable. Clicking on gauges will set your target speed/depth/secondary coolant pump pressure/whatever. Also, if using mouse control, you can choose to instead control the cursor with the keyboard by pressing \ (you will still be able to use the clickable control panels).
• Improved the sonar on board the submarine. It is now possible to locate and track targets from the sonar screen (then move to the weapons control panel to fire a torpedo). LOFAR analysis can be used to identify ships (match their sound signature to the database).
• Sonar and visual contacts are now reported, so you won't accidentally fast travel past an important ship. To avoid spamming the message log you can enable/disable contact reports with Lshift+C.
• Reactor damage models have been fixed. They now put out a LOT more radiation when damaged, and damage to the coolant pumps will severely reduce the coolant pressure.
• You can now switch on city labels on the map screen by pressing Z.
• Better hydrodynamics modelling - dive planes are now simulated, so it is quicker to dive/surface while moving quickly.
• Completely recoded pressure and water flow calculations. The models for both are now extremely realistic and should handle almost any situation correctly.
• Nitrogen narcosis and other health adverse effects related to water pressure are now simulated.
• Sound effects now loop more smoothly (thanks to Torkovsky from Reddit)
• New sound effect for crash dives (thanks to Tango589 from Subsim)
• Added an adjustable 'safety period' after the start of the game and after refits, when no accidents can occur on the sub. The length of this safety period can be changed in gameoptions.ini.
• Added two types of AI submarine and one more class of AI destroyer
• Added Peru, Colombia, Venezuela, Chile, Taiwan and the Netherlands (all playable). Brazil is also a playable nation now.
• Added 11 new cities, mostly in South America
• The world map now renders more efficiently, significantly improving performance on older computers.
• Added crew names for Italy, Turkey, India, Poland, Netherlands.
• Added ship names for Poland, Netherlands, Australia, Indonesia.
• Added ability to change number of ships and aircraft in world in gameoptions.ini
• Added support for up to 8 torpedo tubes, 4 reactors and 4 turbines in custom submarines, although the GUI will look weird. Also added support for single-reactor subs.
• Added ability to choose what GUI folder a sub uses (top of objects.ini in sub folder), and added a GUI folder for use with single-reactor subs.
• The most important performance characteristics of the sub have been moved to "performance.ini" in the sub/default/ folder. This allows you to change the maximum speed, battery capacity, bilge pump power consumption etc.
• Depth charges can now cause more damage.
• There is now a bit more visual feedback when the submarine is undergoing a refit.
• Tweaked ability of reactor shielding to withstand water pressure.
• Tweaked submarine noise characteristics.
• Doubled the rate of oxygen production from electrolysis.
• Fixed a bug preventing repairs to objects without a damage assessment - you can now point at an object an press R, just like you would repair the hull.
• Fixed a bug where the player was ordered to sink a ship which was already destroyed.
• Fixed a bug where the diesel generators continued to generate 4kW while switched off.
• Fixed a bug where torpedoes where not automatically reloaded during a refit.
• Fixed a bug which prevented players from repairing the hull under a torpedo tube.

Note: If you created a custom submarine for version 0.22 and you want to port it to version 0.23, you must take the following steps:
1. Copy "performance.ini" from the /subs/default/ folder to your custom sub folder, and set your submarine's maximum speed, battery capacity etc.
2. Add "ui_folder = default" under [GENERAL] in your submarine's objects.ini file.
3. Replace the entire [TURBINES] section in your custom sub's objects.ini, with the [TURBINES] section from the default sub. You can then customise it again if you wish.