diff --git a/Core/GameEngine/Include/Common/GameDefines.h b/Core/GameEngine/Include/Common/GameDefines.h
index 1bf9f096fcf..3c575b68c67 100644
--- a/Core/GameEngine/Include/Common/GameDefines.h
+++ b/Core/GameEngine/Include/Common/GameDefines.h
@@ -64,7 +64,7 @@
 #endif
 
 #ifndef PRESERVE_RADAR_WARNING_SUPPRESSION
-#define PRESERVE_RADAR_WARNING_SUPPRESSION (1)
+#define PRESERVE_RADAR_WARNING_SUPPRESSION (0) // Per-object cooldown in tryUnderAttackEvent supersedes this map-wide suppression.
 #endif
 
 #ifndef PRESERVE_STRUCTURE_STEALTH_DURING_REPAIR
diff --git a/Core/GameEngine/Include/Common/Radar.h b/Core/GameEngine/Include/Common/Radar.h
index 5e170c261fc..d5882676b9d 100644
--- a/Core/GameEngine/Include/Common/Radar.h
+++ b/Core/GameEngine/Include/Common/Radar.h
@@ -117,6 +117,7 @@ class RadarObject : public MemoryPoolObject,
 	Object *m_object;				///< the object
 	RadarObject *m_next;		///< next radar object
 	Color m_color;					///< color to draw for this object on the radar
+	UnsignedInt m_lastUnderAttackAlarmFrame;	///< last logic frame this object's under-attack alarm fired
 
 };
 
diff --git a/Core/GameEngine/Source/Common/System/Radar.cpp b/Core/GameEngine/Source/Common/System/Radar.cpp
index 313b8f36e47..b665cabab1e 100644
--- a/Core/GameEngine/Source/Common/System/Radar.cpp
+++ b/Core/GameEngine/Source/Common/System/Radar.cpp
@@ -100,6 +100,7 @@ RadarObject::RadarObject()
 	m_object = nullptr;
 	m_next = nullptr;
 	m_color = GameMakeColor( 255, 255, 255, 255 );
+	m_lastUnderAttackAlarmFrame = 0xFFFFFFFF;
 
 }
 
@@ -1046,9 +1047,21 @@ void Radar::tryUnderAttackEvent( const Object *obj )
 	if( obj == nullptr )
 		return;
 
+	// Per-object cooldown: each unit can alarm at most once per suppression window.
+	// This prevents a single object (e.g. a supply plane) from re-triggering the alarm
+	// every time the global event window expires.
+	const UnsignedInt framesBetweenAlarms = LOGICFRAMES_PER_SECOND * 10;
+	UnsignedInt currentFrame = TheGameLogic->getFrame();
+	RadarObject *radarData = obj->friend_getRadarData();
+	if( radarData && currentFrame - radarData->m_lastUnderAttackAlarmFrame < framesBetweenAlarms )
+		return;
+
 	// try to create the event
 	Bool eventCreated = tryEvent( RADAR_EVENT_UNDER_ATTACK, obj->getPosition() );
 
+	if( eventCreated && radarData )
+		radarData->m_lastUnderAttackAlarmFrame = currentFrame;
+
 	// if event created, do some more feedback
 	if( eventCreated )
 	{