diff --git a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
index bb63e8a5..da5abc6a 100644
--- a/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
+++ b/src/Server/ZB.MOM.WW.OtOpcUa.Runtime/Drivers/DriverHostActor.cs
@@ -542,7 +542,7 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
                 AlarmId: nodeId,
                 EquipmentPath: meta.EquipmentId,
                 AlarmName: meta.Name,
-                TransitionKind: msg.Args.Kind.ToString(),
+                TransitionKind: ToEventKind(msg.Args.Kind),
                 // The projector mapped the four-bucket AlarmSeverity onto the OPC UA 1..1000 scale already;
                 // reuse its ushort so the condition node + the alerts row agree on severity.
                 Severity: snapshot.Severity,
@@ -559,6 +559,19 @@ public sealed class DriverHostActor : ReceiveActor, IWithTimers
         }
     }
 
+    /// <summary>Maps a native <see cref="AlarmTransitionKind"/> onto the canonical alarm event-kind
+    /// vocabulary scripted alarms emit (the <c>EmissionKind</c> names) so a native row renders with the
+    /// correct chip on the <c>/alerts</c> page and historizes into the same <c>EventKind</c> column as
+    /// scripted alarms. An unmapped/unknown transition surfaces as <c>Activated</c> (visible) rather than
+    /// a grey unknown label.</summary>
+    private static string ToEventKind(AlarmTransitionKind kind) => kind switch
+    {
+        AlarmTransitionKind.Raise or AlarmTransitionKind.Retrigger => "Activated",
+        AlarmTransitionKind.Clear => "Cleared",
+        AlarmTransitionKind.Acknowledge => "Acknowledged",
+        _ => "Activated",
+    };
+
     /// <summary>
     ///     Routes an inbound operator write (Task 11 Asks this from the OPC UA node-manager side) to the
     ///     owning driver child. Order matters:
diff --git a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorNativeAlarmTests.cs b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorNativeAlarmTests.cs
index 1bc2a7f2..425426b2 100644
--- a/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorNativeAlarmTests.cs
+++ b/tests/Server/ZB.MOM.WW.OtOpcUa.Runtime.Tests/Drivers/DriverHostActorNativeAlarmTests.cs
@@ -139,7 +139,7 @@ public sealed class DriverHostActorNativeAlarmTests : RuntimeActorTestBase
         evt.AlarmId.ShouldBe("eq-1/temp_hi");          // the folder-scoped condition NodeId
         evt.EquipmentPath.ShouldBe("eq-1");            // from the alarm-bearing tag's EquipmentId
         evt.AlarmName.ShouldBe("temp_hi");             // from the tag's Name
-        evt.TransitionKind.ShouldBe("Raise");          // AlarmEventArgs.Kind.ToString()
+        evt.TransitionKind.ShouldBe("Activated");      // native Kind → canonical EmissionKind vocabulary (Raise → Activated)
         evt.AlarmTypeName.ShouldBe("OffNormalAlarm");  // the tag's alarm AlarmType
         evt.Severity.ShouldBe(700);                    // AlarmSeverity.High → projector 700
         evt.Message.ShouldBe("temperature high");