diff --git a/data/missions/coyote/03 - coyote assault #3.json b/data/missions/coyote/03 - coyote assault #3.json
index 1d71700..74e6198 100644
--- a/data/missions/coyote/03 - coyote assault #3.json	
+++ b/data/missions/coyote/03 - coyote assault #3.json	
@@ -74,7 +74,7 @@
 			"type" : "ET_JUMPGATE",
 			"x" : 25,
 			"y" : 25,
-			"systemPower" : 0
+			"flags" : "+EF_DISABLED"
 		}
 	],
 	"script" : [
@@ -99,7 +99,7 @@
 				"MSG_BOX Dodds;Estelle, we've got this. We can take them.",
 				"MSG_BOX de Winter;We're taking too many losses, Dodds. Fall back now, that's an order.",
 				"WAIT_MSG_BOX",
-				"ACTIVATE_JUMPGATE",
+				"ACTIVATE_JUMPGATE 1",
 				"RETREAT_ALLIES"
 			]
 		}
diff --git a/data/missions/granada/02 - suspect packages #2.json b/data/missions/granada/02 - suspect packages #2.json
index 8c83f4e..2f76c94 100644
--- a/data/missions/granada/02 - suspect packages #2.json	
+++ b/data/missions/granada/02 - suspect packages #2.json	
@@ -110,7 +110,7 @@
 			"type" : "ET_JUMPGATE",
 			"x" : 10,
 			"y" : 8,
-			"systemPower" : 0
+			"flags" : "+EF_DISABLED"
 		}
 	],
 	"items" : [
@@ -159,7 +159,7 @@
 				"WAIT 2",
 				"MSG_BOX Tug;Tow cable attached. Ready to head home.",
 				"MSG_BOX Carr;We're done here. Let's bring our mystery guest in.",
-				"ACTIVATE_JUMPGATE",
+				"ACTIVATE_JUMPGATE 1",
 				"WAIT 20",
 				"ACTIVATE_ENTITIES Dart",
 				"ACTIVATE_OBJECTIVES Destroy intercepting Darts",
diff --git a/data/missions/rothan/02 - rothan defence #2.json b/data/missions/rothan/02 - rothan defence #2.json
index 2960b49..42b580d 100644
--- a/data/missions/rothan/02 - rothan defence #2.json	
+++ b/data/missions/rothan/02 - rothan defence #2.json	
@@ -101,7 +101,7 @@
 			"type" : "ET_JUMPGATE",
 			"x" : 30,
 			"y" : 1,
-			"systemPower" : 0
+			"flags" : "+EF_DISABLED"
 		}
 	],
 	"script" : [
@@ -146,7 +146,7 @@
 				"MSG_BOX Control;Commander, your current missions has been aborted. Return to the jumpgate. We need a full report as to what just happened out there.",
 				"MSG_BOX Spencer;Got it, coming home.",
 				"WAIT_MSG_BOX",
-				"ACTIVATE_JUMPGATE",
+				"ACTIVATE_JUMPGATE 1",
 				"ACTIVATE_OBJECTIVES Retreat to jumpgate",
 				"RETREAT_ALLIES"
 			]
diff --git a/src/battle/hud.c b/src/battle/hud.c
index 85eda92..eca800b 100644
--- a/src/battle/hud.c
+++ b/src/battle/hud.c
@@ -330,7 +330,7 @@ static void drawPlayerTargeter(void)
 	float angle;
 	int x, y;
 	
-	if (player->target || battle.missionTarget || (battle.jumpgate && battle.jumpgate->systemPower))
+	if (player->target || battle.missionTarget || jumpgateEnabled())
 	{
 		if (player->target)
 		{
@@ -376,7 +376,7 @@ static void drawPlayerTargeter(void)
 		blitRotated(targetPointer, x - battle.camera.x, y - battle.camera.y, angle);
 	}
 	
-	if (battle.jumpgate && battle.jumpgate->systemPower)
+	if (jumpgateEnabled())
 	{
 		angle = getAngle(player->x, player->y, battle.jumpgate->x, battle.jumpgate->y);
 		x = player->x;
@@ -478,7 +478,7 @@ static void drawDistancesInfo(void)
 		y += 25;
 	}
 	
-	if (battle.jumpgate && battle.jumpgate->systemPower)
+	if (jumpgateEnabled())
 	{
 		distance = distanceToKM(player->x, player->y, battle.jumpgate->x, battle.jumpgate->y);
 		
diff --git a/src/battle/hud.h b/src/battle/hud.h
index 832fc6e..b67c9b8 100644
--- a/src/battle/hud.h
+++ b/src/battle/hud.h
@@ -34,6 +34,7 @@ extern int getPercent(float current, float total);
 extern int playerHasGun(int type);
 extern char *getTranslatedString(char *string);
 extern char *timeToString(long millis, int showHours);
+extern int jumpgateEnabled(void);
 
 extern App app;
 extern Battle battle;
diff --git a/src/battle/jumpgate.c b/src/battle/jumpgate.c
index 5dec983..64c6365 100644
--- a/src/battle/jumpgate.c
+++ b/src/battle/jumpgate.c
@@ -45,6 +45,26 @@ Entity *spawnJumpgate(void)
 	return jumpgate;
 }
 
+int jumpgateEnabled(void)
+{
+	return (battle.jumpgate && (!(battle.jumpgate->flags & EF_DISABLED)));
+}
+
+void activateJumpgate(int activate)
+{
+	if (battle.jumpgate)
+	{
+		if (activate)
+		{
+			battle.jumpgate->flags &= ~EF_DISABLED;
+		}
+		else
+		{
+			battle.jumpgate->flags |= EF_DISABLED;
+		}
+	}
+}
+
 static void think(void)
 {
 	self->thinkTime = 4;
@@ -55,7 +75,7 @@ static void think(void)
 		self->angle -= 360;
 	}
 
-	if (self->systemPower)
+	if (jumpgateEnabled())
 	{
 		handleFleeingEntities();
 	}
@@ -128,7 +148,7 @@ static void addEscapeEffect(Entity *ent)
 
 static void draw(void)
 {
-	if (self->systemPower)
+	if (jumpgateEnabled())
 	{
 		blitRotated(portal, self->x - battle.camera.x, self->y - battle.camera.y, portalAngle);
 	}
diff --git a/src/battle/script.c b/src/battle/script.c
index 73e195c..91b58c4 100644
--- a/src/battle/script.c
+++ b/src/battle/script.c
@@ -211,7 +211,8 @@ static void executeNextLine(ScriptRunner *runner)
 	}
 	else if (strcmp(command, "ACTIVATE_JUMPGATE") == 0)
 	{
-		battle.jumpgate->systemPower = MAX_SYSTEM_POWER;
+		sscanf(line, "%*s %d", &intParam[0]);
+		activateJumpgate(intParam[0]);
 	}
 	else if (strcmp(command, "ACTIVATE_NEXT_WAYPOINT") == 0)
 	{
diff --git a/src/battle/script.h b/src/battle/script.h
index 2f05ea9..b2c98c1 100644
--- a/src/battle/script.h
+++ b/src/battle/script.h
@@ -36,6 +36,7 @@ extern int showingMessageBoxes(void);
 extern char *getTranslatedString(char *string);
 extern void spawnScriptFighter(char *fighters, char *side, int num, char *location);
 extern void activateNextWaypoint(int id);
+extern void activateJumpgate(int activate);
 
 extern Battle battle;
 extern Colors colors;
diff --git a/src/galaxy/mission.c b/src/galaxy/mission.c
index 6529aaa..1f5150c 100644
--- a/src/galaxy/mission.c
+++ b/src/galaxy/mission.c
@@ -374,7 +374,7 @@ static void loadFighters(cJSON *node)
 	Entity *e;
 	char **types, *name, *groupName, *type;
 	int side, scatter, number, active;
-	int i, numTypes, addFlags, addAIFlags, systemPower;
+	int i, numTypes, addFlags, addAIFlags;
 	long flags, aiFlags;
 	float x, y;
 
@@ -398,7 +398,6 @@ static void loadFighters(cJSON *node)
 			number = getJSONValue(node, "number", 1);
 			scatter = getJSONValue(node, "scatter", 1);
 			active = getJSONValue(node, "active", 1);
-			systemPower = getJSONValue(node, "systemPower", MAX_SYSTEM_POWER);
 
 			if (cJSON_GetObjectItem(node, "flags"))
 			{
@@ -461,12 +460,6 @@ static void loadFighters(cJSON *node)
 				{
 					STRNCPY(e->groupName, groupName, MAX_NAME_LENGTH);
 				}
-				
-				e->systemPower = systemPower;
-				if (!e->systemPower)
-				{
-					e->flags |= EF_DISABLED;
-				}
 			}
 
 			node = node->next;
@@ -572,8 +565,9 @@ static void loadEntities(cJSON *node)
 {
 	Entity *e;
 	char *name, *groupName;
-	int i, type, scatter, number, active, systemPower;
+	int i, type, scatter, number, active, addFlags;
 	float x, y;
+	long flags;
 
 	if (node)
 	{
@@ -593,7 +587,11 @@ static void loadEntities(cJSON *node)
 			number = getJSONValue(node, "number", 1);
 			active = getJSONValue(node, "active", 1);
 			scatter = getJSONValue(node, "scatter", 1);
-			systemPower = getJSONValue(node, "systemPower", MAX_SYSTEM_POWER);
+			
+			if (cJSON_GetObjectItem(node, "flags"))
+			{
+				flags = flagsToLong(cJSON_GetObjectItem(node, "flags")->valuestring, &addFlags);
+			}
 
 			for (i = 0 ; i < number ; i++)
 			{
@@ -622,6 +620,20 @@ static void loadEntities(cJSON *node)
 				{
 					STRNCPY(e->groupName, groupName, MAX_NAME_LENGTH);
 				}
+				
+				if (flags != -1)
+				{
+					if (addFlags)
+					{
+						e->flags |= flags;
+					}
+					else
+					{
+						e->flags = flags;
+
+						SDL_LogMessage(SDL_LOG_CATEGORY_APPLICATION, SDL_LOG_PRIORITY_WARN, "Flags for '%s' (%s) replaced", e->name, e->defName);
+					}
+				}
 
 				e->x = x;
 				e->y = y;
@@ -634,8 +646,6 @@ static void loadEntities(cJSON *node)
 
 				e->active = active;
 
-				e->systemPower = systemPower;
-
 				SDL_QueryTexture(e->texture, NULL, NULL, &e->w, &e->h);
 			}