DCS 2.5.2.17559 in the Open Beta

The Persian Gulf map is available.

DCS World
Su-25T: training mission CN voiceover fixed
In-cockpit mirrors will not have red outline.
Sound - reworked guns sources loading routine to allow aircraft-module-specific samples to be used.
Restored texture of KDO G40

DCS A-10C
A-10C: training mission CN voiceover fixed

DCS Flaming Cliffs
FC3: added A-10A CN flight manual

DCS MiG-21Bis by Magnitude 3 LLC
Created new indicator lights.
Fixed textures on English ASP switches and other objects.
Adjusted red flood-lights to be brighter.
Adjusted pink color lights to red-ish
Fixed see-through areas in cockpit.
Fixed flap and ARK buttons' position animation.
Corrected SPO's center area not to rotate when switching between night/day modes.
Fixed RSBN NPP Glideslope animations.
Fixed RPM 2 needle not overtaking RPM 1 needle.
Fixed non-rotating compressor blades.
Fixed landing gear strut lights from being on constantly.
Fixed a bug that caused small errors in aerodynamic forces calculation for the landing gear.
Slight improvements in "Game Flight Mode" and/or "Simplified Engine Management" is on.
Engine won't shut down on high lateral or high negative longitudinal acceleration (such are in spins)
Engine won't stop at low oil pressure time trigger.
Engine won't shut down at low fuel pressure.
Added Iran, Iraq and Syria liveries by Jack

DCS AV-8B N/A by Razbam Simulations LLC
IR Maverick slew and lock updates
Stabilator indicator correction
Corrected water flowing on and off rapidly in Landing STO mode
Corrected MPCD glow not going off when MPCD goes off after being on
Corrected minor shake due to gear model when not moving with parking brake
Increase canopy open/close speed to match video references
Canopy open/close keyboard shortcut now automatically performs unlock handle
Corrected Radio COMM 2 not working in UFC mode
Corrected ARBS/DMT TDC bug.
IR/TV Mavs launch constrain keyhole is now active.
AGM-65Es are now active.
MPCD behavior after firing a Maverick has been updated.
IR/TV Mavs axis slew is now active.
STRS Page WPN FAIL message bug is now fixed. (The bug appears when using mavericks).
Weapon AUTO (CCRP) release mode improved logic, cues, and accuracy
Weapon CIP (CCIP) release mode is upgraded. Still WiP.
NVG Brightness control

DCS M-2000C by Razbam Simulations LLC
Vortices/vapor effects
Corrected issue when on engine idle on ground and subsystems not receiving power correctly
Corrected endless refueling when on ground and requesting less internal fuel than currently in aircraft
Corrected AI main gear pos contact point slightly above ground
Corrected linearity in pitch control for consistent pitch down response

DCS SA342 Gazelle by Polychop Simulations
Gazelle TV black screen fixed

DCS UH-1H by BST
UH-1H: Corrected "Rebel Base" mission (by slpak). Removed forest in target zone.

MiG-15bis by BST
Fixed game freezes when ADF switch is enabled first time

Campaigns
F-5E ACM Campaign - corrected missions with F-4E.
F-5E BFM Campaign - corrected missions with F-4E.
F-15C Aggressors BFM Campaign - corrected missions with F-4E.
A-10C BFT Campaign - mission BFT05 corrected.
L-39 Kursant Campaign - missions 2, 4, 5, 7 corrected.
A-10C Advanced Aircraft Training Campaign - corrected altitude triggers, updated some dialogue text, added mission success music.

Known issues
Player parkings on carrier are broken.
External lights (flashlight, taxi light) are visible inside some cockpits.
Spitfire tail wheel contact model with ground is broken.