[HW3]

Make sure your Game Play Settings in your SH3 file in Documents looks like this

[Current]
LimitedBatteries=true
LimitedCompressedAir=true
LimitedO2=true
LimitedFuel=true
RealisticVulnerability=true
RealisticRepairTime=true
RealisticShipSinkingTime=true
ManualTargetingSystem=false
NoMapUpdate=false
RealisticSensors=true
DudTorpedoes=true
RealisticReload=true
NoEventCamera=true
NoExternalView=false
NoStabilizeView=true
NoNoiseMeter=true
NoWeaponOfficerAssist=false

and your file in SH3 looks like this

data/Cfg/GameplaySettings
[RealismPercentage]
LimitedBatteriesRealismPercentage=5
LimitedCompressedAirRealismPercentage=1
LimitedO2RealismPercentage=6
LimitedFuelRealismPercentage=6
RealisticVulnerabilityRealismPercentage=5
RealisticRepairTimeRealismPercentage=8
RealisticShipSinkingTimeRealismPercentage=2
ManualTargetingSystemRealismPercentage=10
NoMapUpdateRealismPercentage=0
RealisticSensorsRealismPercentage=11
DudTorpedoesRealismPercentage=4
RealisticReloadRealismPercentage=6
NoEventCameraRealismPercentage=3
NoExternalViewRealismPercentage=10
NoStabilizeViewRealismPercentage=5
NoNoiseMeterRealismPercentage=12
NoWeaponOfficerAssistRealismPercentage=6