Fixed OOS linked to technologies not being properly reset between games.
Fixed OOS related to asking an operative to resume their mission after the operation they are assigned to completes.
Patrol convoy raiding and convoy escort missions now rely on local navy positions for air superiority rather than the average of air zones to stop high air superiority in a zone from saving the ships from spotting in another.
Reduce heavy gun target signature from 90 to 80 and increased light gun target signature from 40 to 45 to make heavy guns a bit more versatile and light guns a bit slower at picking off screens.
Reduced carrier traffic penalty from 100% to 80% in heavy rain.
Increased naval hit penalty from 10% to 20% in heavy rain.
Increase air attack targeting scoring for carriers to make them more likely targets for other carriers.
Increased air-to-air damage factor in carrier battles from 5 to 6.
Effective carrier plane advantage in naval combat now gives penalties to positioning for the other side.
Added an extra speed boost to convoys retreat speed when screened.
The cooldown depends on the screening efficiency of the defenders so a defended convoy will have a longer cooldown the better defended it is.
Added a cooldown timer after naval transfers are engaged at sea and escape to avoid stun-locking issues with many small fleets.
Increased carrier hull surface detection base from 20 to 26.
Carrier planes no longer take area coverage penalties on their targeted/ground missions.
Increased damage of all mediumship batteries.
Increased piercing of all mediumship batteries.
Increased damage of all heavy ship batteries.
Decreased IC cost of all ship heavy batteries.
Increased the cost of initial radar tech, lower cost on all other radar techs.
Decreased research cost of armor schemes.
Decreased research cost of naval munitions upgrades for light and heavy guns.
Increased research cost on torpedo module upgrades.
Increased research cost on 19 submarine hulls.
Decreased research cost on depth charge technologies.
Decreased research cost on destroyer hulls.
Decreased suppression value of SP-AT battalions.
Decreased suppression value of SP-AA battalions.
Decreased suppression value of SP-Art battalions.
What is new in Hearts of Iron IV Update 1.9.3 Patch Notes (June 4, 2020)?