diff --git a/README.md b/README.md
index 4d51bd19..82e950b4 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,10 @@ First, a big thanks to shdwp, for starting the original DCS Liberation project.
 
 Then, DCS Liberation uses [pydcs](http://github.com/pydcs/dcs) for mission generation, and nothing would be possible without this.
 It also uses the popular [Mist](https://github.com/mrSkortch/MissionScriptingTools) lua framework for mission scripting.
-And for the JTAC feature, DCS Liberation embed Ciribob's JTAC Autolase [script](https://github.com/ciribob/DCS-JTACAutoLaze).
+
+Excellent lua scripts DCS Liberation uses as plugins:
+
+* For the JTAC feature, DCS Liberation embeds Ciribob's JTAC Autolase [script](https://github.com/ciribob/DCS-JTACAutoLaze).
+* Walder's [Skynet-IADS](https://github.com/walder/Skynet-IADS) is used for Integrated Air Defense System.
 
 Please also show some support to these projects ! 
diff --git a/changelog.md b/changelog.md
index eb6d4fe8..77d1c308 100644
--- a/changelog.md
+++ b/changelog.md
@@ -25,7 +25,6 @@
 * **[Misc]** Spitfire variant with clipped wings was not seen as flyable by DCS Liberation (hence could not be setup as client/player slot)
 * **[Misc]** Updated Syria terrain parking slots database, the out-of-date database could end up generating aircraft in wrong slots (We are still experiencing issues with somes airbases, such as Khalkhalah though)
 
-
 # 2.2.0
 
 ## Features/Improvements :
diff --git a/gen/aircraft.py b/gen/aircraft.py
index f3690915..758bf0b8 100644
--- a/gen/aircraft.py
+++ b/gen/aircraft.py
@@ -1197,12 +1197,13 @@ class AircraftConflictGenerator:
             viggen_target_points = [
                 (idx, point) for idx, point in enumerate(filtered_points) if point.waypoint_type in TARGET_WAYPOINTS
             ]
-            keep_target = viggen_target_points[random.randint(0, len(viggen_target_points) - 1)]
-            filtered_points = [
-                point for idx, point in enumerate(filtered_points) if (
-                        point.waypoint_type not in TARGET_WAYPOINTS or idx == keep_target[0]
-                    )
-                ]
+            if viggen_target_points:
+                keep_target = viggen_target_points[random.randint(0, len(viggen_target_points) - 1)]
+                filtered_points = [
+                    point for idx, point in enumerate(filtered_points) if (
+                            point.waypoint_type not in TARGET_WAYPOINTS or idx == keep_target[0]
+                        )
+                    ]
             
         for idx, point in enumerate(filtered_points):
             PydcsWaypointBuilder.for_waypoint(
diff --git a/pydcs b/pydcs
index 6dbfa2db..2883be31 160000
--- a/pydcs
+++ b/pydcs
@@ -1 +1 @@
-Subproject commit 6dbfa2db64c02494ef3e990c1325f121fefa6b5b
+Subproject commit 2883be31c2eb80834b93efd8d20ca17913986e9b
diff --git a/pydcs_extensions/highdigitsams/highdigitsams.py b/pydcs_extensions/highdigitsams/highdigitsams.py
new file mode 100644
index 00000000..3ff206d0
--- /dev/null
+++ b/pydcs_extensions/highdigitsams/highdigitsams.py
@@ -0,0 +1,169 @@
+from dcs import unittype
+
+
+class SAM_SA_20_S_300PMU1_TR_30N6E(unittype.VehicleType):
+    id = "S-300PMU1 40B6M tr"
+    name = "SAM SA-20 S-300PMU1 TR 30N6E"
+    detection_range = 160000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_20_S_300PMU1_TR_30N6E_truck(unittype.VehicleType):
+    id = "S-300PMU1 30N6E tr"
+    name = "SAM SA-20 S-300PMU1 TR 30N6E(truck)"
+    detection_range = 160000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_20_S_300PMU1_SR_5N66E(unittype.VehicleType):
+    id = "S-300PMU1 40B6MD sr"
+    name = "SAM SA-20 S-300PMU1 SR 5N66E"
+    detection_range = 120000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_20_S_300PMU1_SR_64N6E(unittype.VehicleType):
+    id = "S-300PMU1 64N6E sr"
+    name = "SAM SA-20 S-300PMU1 SR 64N6E"
+    detection_range = 300000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_23_S_300VM_9S15M2_SR(unittype.VehicleType):
+    id = "S-300VM 9S15M2 sr"
+    name = "SAM SA-23 S-300VM 9S15M2 SR"
+    detection_range = 320000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_23_S_300VM_9S19M2_SR(unittype.VehicleType):
+    id = "S-300VM 9S19M2 sr"
+    name = "SAM SA-23 S-300VM 9S19M2 SR"
+    detection_range = 310000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_23_S_300VM_9S32ME_TR(unittype.VehicleType):
+    id = "S-300VM 9S32ME tr"
+    name = "SAM SA-23 S-300VM 9S32ME TR"
+    detection_range = 230000
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_20_S_300PMU1_LN_5P85CE(unittype.VehicleType):
+    id = "S-300PMU1 5P85CE ln"
+    name = "SAM SA-20 S-300PMU1 LN 5P85CE"
+    detection_range = 0
+    threat_range = 150000
+    air_weapon_dist = 150000
+
+
+class SAM_SA_20_S_300PMU1_LN_5P85DE(unittype.VehicleType):
+    id = "S-300PMU1 5P85DE ln"
+    name = "SAM SA-20 S-300PMU1 LN 5P85DE"
+    detection_range = 0
+    threat_range = 150000
+    air_weapon_dist = 150000
+
+
+class SAM_SA_10__5V55RUD__S_300PS_LN_5P85CE(unittype.VehicleType):
+    id = "S-300PS 5P85CE ln"
+    name = "SAM SA-10 (5V55RUD) S-300PS LN 5P85CE"
+    detection_range = 0
+    threat_range = 90000
+    air_weapon_dist = 90000
+
+
+class SAM_SA_10__5V55RUD__S_300PS_LN_5P85DE(unittype.VehicleType):
+    id = "S-300PS 5P85DE ln"
+    name = "SAM SA-10 (5V55RUD) S-300PS LN 5P85DE"
+    detection_range = 0
+    threat_range = 90000
+    air_weapon_dist = 90000
+
+
+class SAM_SA_23_S_300VM_9A83ME_LN(unittype.VehicleType):
+    id = "S-300VM 9A83ME ln"
+    name = "SAM SA-23 S-300VM 9A83ME LN"
+    detection_range = 0
+    threat_range = 90000
+    air_weapon_dist = 90000
+
+
+class SAM_SA_23_S_300VM_9A82ME_LN(unittype.VehicleType):
+    id = "S-300VM 9A82ME ln"
+    name = "SAM SA-23 S-300VM 9A82ME LN"
+    detection_range = 0
+    threat_range = 200000
+    air_weapon_dist = 200000
+
+
+class SAM_SA_17_Buk_M1_2_LN_9A310M1_2(unittype.VehicleType):
+    id = "SA-17 Buk M1-2 LN 9A310M1-2"
+    name = "SAM SA-17 Buk M1-2 LN 9A310M1-2"
+    detection_range = 120000
+    threat_range = 50000
+    air_weapon_dist = 50000
+
+
+class SAM_SA_2__V759__LN_SM_90(unittype.VehicleType):
+    id = "S_75M_Volhov_V759"
+    name = "SAM SA-2 (V759) LN SM-90"
+    detection_range = 0
+    threat_range = 50000
+    air_weapon_dist = 50000
+
+
+class SAM_HQ_2_LN_SM_90(unittype.VehicleType):
+    id = "HQ_2_Guideline_LN"
+    name = "SAM HQ-2 LN SM-90"
+    detection_range = 0
+    threat_range = 50000
+    air_weapon_dist = 50000
+
+
+class SAM_SA_3__V_601P__LN_5P73(unittype.VehicleType):
+    id = "5p73 V-601P ln"
+    name = "SAM SA-3 (V-601P) LN 5P73"
+    detection_range = 0
+    threat_range = 18000
+    air_weapon_dist = 18000
+
+
+class SAM_SA_20_S_300PMU1_CP_54K6(unittype.VehicleType):
+    id = "S-300PMU1 54K6 cp"
+    name = "SAM SA-20 S-300PMU1 CP 54K6"
+    detection_range = 0
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_23_S_300VM_9S457ME_CP(unittype.VehicleType):
+    id = "S-300VM 9S457ME cp"
+    name = "SAM SA-23 S-300VM 9S457ME CP"
+    detection_range = 0
+    threat_range = 0
+    air_weapon_dist = 0
+
+
+class SAM_SA_24_Igla_S_manpad(unittype.VehicleType):
+    id = "SA-24 Igla-S manpad"
+    name = "SAM SA-24 Igla-S manpad"
+    detection_range = 5000
+    threat_range = 6000
+    air_weapon_dist = 6000
+
+
+class SAM_SA_14_Strela_3_manpad(unittype.VehicleType):
+    id = "SA-14 Strela-3 manpad"
+    name = "SAM SA-14 Strela-3 manpad"
+    detection_range = 5000
+    threat_range = 4500
+    air_weapon_dist = 4500
diff --git a/pydcs_extensions/mod_units.py b/pydcs_extensions/mod_units.py
index 132a7b2f..cfa1b321 100644
--- a/pydcs_extensions/mod_units.py
+++ b/pydcs_extensions/mod_units.py
@@ -1,4 +1,5 @@
 from pydcs_extensions.a4ec.a4ec import A_4E_C
+from pydcs_extensions.highdigitsams import highdigitsams
 from pydcs_extensions.mb339.mb339 import MB_339PAN
 from pydcs_extensions.rafale.rafale import Rafale_M, Rafale_A_S
 from pydcs_extensions.su57.su57 import Su_57
@@ -39,5 +40,26 @@ MODDED_VEHICLES = [
     frenchpack.DIM__TOYOTA_BLUE,
     frenchpack.DIM__TOYOTA_GREEN,
     frenchpack.DIM__TOYOTA_DESERT,
-    frenchpack.DIM__KAMIKAZE
+    frenchpack.DIM__KAMIKAZE,
+    highdigitsams.SAM_SA_20_S_300PMU1_TR_30N6E,
+    highdigitsams.SAM_SA_20_S_300PMU1_TR_30N6E_truck,
+    highdigitsams.SAM_SA_20_S_300PMU1_SR_5N66E,
+    highdigitsams.SAM_SA_20_S_300PMU1_SR_64N6E,
+    highdigitsams.SAM_SA_23_S_300VM_9S15M2_SR,
+    highdigitsams.SAM_SA_23_S_300VM_9S19M2_SR,
+    highdigitsams.SAM_SA_23_S_300VM_9S32ME_TR,
+    highdigitsams.SAM_SA_20_S_300PMU1_LN_5P85CE,
+    highdigitsams.SAM_SA_20_S_300PMU1_LN_5P85DE,
+    highdigitsams.SAM_SA_10__5V55RUD__S_300PS_LN_5P85CE,
+    highdigitsams.SAM_SA_10__5V55RUD__S_300PS_LN_5P85DE,
+    highdigitsams.SAM_SA_23_S_300VM_9A83ME_LN,
+    highdigitsams.SAM_SA_23_S_300VM_9A82ME_LN,
+    highdigitsams.SAM_SA_17_Buk_M1_2_LN_9A310M1_2,
+    highdigitsams.SAM_SA_2__V759__LN_SM_90,
+    highdigitsams.SAM_HQ_2_LN_SM_90,
+    highdigitsams.SAM_SA_3__V_601P__LN_5P73,
+    highdigitsams.SAM_SA_20_S_300PMU1_CP_54K6,
+    highdigitsams.SAM_SA_23_S_300VM_9S457ME_CP,
+    highdigitsams.SAM_SA_24_Igla_S_manpad,
+    highdigitsams.SAM_SA_14_Strela_3_manpad
 ]
\ No newline at end of file
diff --git a/qt_ui/widgets/QTopPanel.py b/qt_ui/widgets/QTopPanel.py
index 4f7e74bc..32ba24a8 100644
--- a/qt_ui/widgets/QTopPanel.py
+++ b/qt_ui/widgets/QTopPanel.py
@@ -48,12 +48,14 @@ class QTopPanel(QFrame):
         self.passTurnButton.setIcon(CONST.ICONS["PassTurn"])
         self.passTurnButton.setProperty("style", "btn-primary")
         self.passTurnButton.clicked.connect(self.passTurn)
+        if not self.game:
+            self.passTurnButton.setEnabled(False)
 
         self.proceedButton = QPushButton("Take off")
         self.proceedButton.setIcon(CONST.ICONS["Proceed"])
         self.proceedButton.setProperty("style", "start-button")
         self.proceedButton.clicked.connect(self.launch_mission)
-        if self.game and self.game.turn == 0:
+        if not self.game or self.game.turn == 0:
             self.proceedButton.setEnabled(False)
 
         self.factionsInfos = QFactionsInfos(self.game)
@@ -101,6 +103,8 @@ class QTopPanel(QFrame):
         self.budgetBox.setGame(game)
         self.factionsInfos.setGame(game)
 
+        self.passTurnButton.setEnabled(True)
+
         if game and game.turn == 0:
             self.proceedButton.setEnabled(False)
         else:
diff --git a/qt_ui/windows/mission/flight/waypoints/QFlightWaypointTab.py b/qt_ui/windows/mission/flight/waypoints/QFlightWaypointTab.py
index 791c7d5b..eeb0eaca 100644
--- a/qt_ui/windows/mission/flight/waypoints/QFlightWaypointTab.py
+++ b/qt_ui/windows/mission/flight/waypoints/QFlightWaypointTab.py
@@ -161,5 +161,3 @@ class QFlightWaypointTab(QFrame):
     def on_change(self):
         self.flight_waypoint_list.update_list()
         self.on_flight_changed.emit()
-
-