diff --git a/MainWindow.IedSmvQuickStart.cs b/MainWindow.IedSmvQuickStart.cs
index 55cbeda2b..44b491472 100644
--- a/MainWindow.IedSmvQuickStart.cs
+++ b/MainWindow.IedSmvQuickStart.cs
@@ -95,12 +95,39 @@ private void IedSmvQuickStart_Click(object sender, RoutedEventArgs e)
         OpenSmvWorkspaceForDevice(device);
     }
 
+    /// <summary>
+    /// Present an inert tab landing state. A selection change must not create
+    /// a viewer, enumerate Npcap adapters or begin a passive wire capture.
+    /// </summary>
+    private void PrepareSelectedSmvWorkspace()
+    {
+        if (SmvWorkspaceStatus is null) return;
+        if (SelectedDevice is not { } selected)
+        {
+            SmvWorkspaceStatus.Text =
+                "Select an IED in Device Explorer, then press Open SMV Capture.";
+            return;
+        }
+
+        if (_activeSmvViewerWindow is { IsLoaded: true } viewer &&
+            viewer.DeviceId.Equals(selected.DeviceId, StringComparison.OrdinalIgnoreCase))
+        {
+            SmvWorkspaceStatus.Text =
+                $"SMV viewer is already open for {selected.Name}; snapshot retained.";
+            return;
+        }
+
+        SmvWorkspaceStatus.Text =
+            $"Ready for {selected.Name} · press Open SMV Capture to inspect adapters and streams.";
+    }
+
     private void ActivateSelectedSmvWorkspace()
     {
         if (SelectedDevice is { } device)
             OpenSmvWorkspaceForDevice(device);
         else if (SmvWorkspaceStatus is not null)
-            SmvWorkspaceStatus.Text = "Select an IED in Device Explorer, then open SMV capture.";
+            SmvWorkspaceStatus.Text =
+                "Select an IED in Device Explorer, then press Open SMV Capture.";
     }
 
     private void OpenSmvCapture_Click(object sender, RoutedEventArgs e)
diff --git a/MainWindow.xaml b/MainWindow.xaml
index 24bc6d710..881abf2fe 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -120,7 +120,7 @@
                     <Button x:Name="NavSmvButton" Grid.Column="5" Tag="5" TabIndex="5" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="SMV · Sampled Values">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
-                                <Path Data="{StaticResource OperatorLiveMonitorIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
+                                <Path Data="{StaticResource MaterialLiveIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
                             <TextBlock Text="SMV" VerticalAlignment="Center"/>
                         </StackPanel>
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index 1aa9b24a6..5899fa107 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -859,7 +859,9 @@ private void MainTabs_SelectionChanged(object sender, SelectionChangedEventArgs
         }
         else if (MainTabs.SelectedIndex == EngineeringNavigationRoute.SmvWorkspaceIndex)
         {
-            ActivateSelectedSmvWorkspace();
+            // Switching tabs must never start Npcap discovery or SV capture.
+            // The explicit Open SMV Capture command retains the fast workflow.
+            PrepareSelectedSmvWorkspace();
         }
 
         UpdateNavigationVisuals(MainTabs.SelectedIndex, animate: true);
diff --git a/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs b/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs
index a385445fe..f11505995 100644
--- a/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs
+++ b/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs
@@ -76,6 +76,32 @@ public void SmvNav_ReusesExistingDeviceViewer_NotAnotherDecoderOrPoller()
         Assert.DoesNotContain("new MmsClientSession", source);
     }
 
+    [Fact]
+    public void SelectingSmvTab_DoesNotAutoOpenWindowOrStartNpcapCapture()
+    {
+        var main = File.ReadAllText(Find("MainWindow.xaml.cs"));
+        const string tabRoute =
+            "MainTabs.SelectedIndex == EngineeringNavigationRoute.SmvWorkspaceIndex";
+        var index = main.IndexOf(tabRoute, StringComparison.Ordinal);
+        Assert.True(index >= 0);
+        var branch = main[index..Math.Min(main.Length, index + 380)];
+        Assert.Contains("PrepareSelectedSmvWorkspace();", branch);
+        Assert.DoesNotContain("ActivateSelectedSmvWorkspace();", branch);
+
+        var viewer = File.ReadAllText(Find("MainWindow.IedSmvQuickStart.cs"));
+        var prepareStart = viewer.IndexOf("private void PrepareSelectedSmvWorkspace()",
+            StringComparison.Ordinal);
+        var explicitStart = viewer.IndexOf("private void ActivateSelectedSmvWorkspace()",
+            prepareStart, StringComparison.Ordinal);
+        Assert.True(prepareStart > 0 && explicitStart > prepareStart);
+        var passive = viewer[prepareStart..explicitStart];
+        Assert.DoesNotContain("OpenSmvWorkspaceForDevice", passive);
+        Assert.DoesNotContain("ListAdapters", passive);
+        Assert.DoesNotContain("new SmvViewerWindow", passive);
+        Assert.Contains("=> ActivateSelectedSmvWorkspace();", viewer);
+        Assert.Contains("window.EnableFastWorkflow(adapter, routeDetail);", viewer);
+    }
+
     private static string Find(string path)
     {
         for (DirectoryInfo? d = new(AppContext.BaseDirectory); d != null; d = d.Parent)
diff --git a/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs b/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
index 768c59481..072d75def 100644
--- a/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
+++ b/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
@@ -18,7 +18,7 @@ public sealed class MaterialIconConsistencyTests
 
     [Theory]
     [InlineData("NavExplorerButton", "1", "OperatorIecTopologyIcon")]
-    [InlineData("NavSmvButton", "5", "OperatorLiveMonitorIcon")]
+    [InlineData("NavSmvButton", "5", "MaterialLiveIcon")]
     [InlineData("NavEventsButton", "2", "OperatorEventLogIcon")]
     [InlineData("NavAlarmButton", "3", "OperatorAlarmIcon")]
     [InlineData("NavGooseButton", "4", "OperatorIecWirelessIcon")]