diff --git a/EngineeringNavigationRoute.cs b/EngineeringNavigationRoute.cs
new file mode 100644
index 000000000..9af4453a5
--- /dev/null
+++ b/EngineeringNavigationRoute.cs
@@ -0,0 +1,35 @@
+namespace ArIED61850Tester;
+
+/// <summary>
+/// Operator header order is intentionally independent of the stable WPF
+/// workspace indices. Preserve legacy bindings and passive monitors while
+/// removing the redundant Live Monitor destination from operator navigation.
+/// The legacy live view at index 1 has no navigable header button.
+/// </summary>
+public static class EngineeringNavigationRoute
+{
+    public const int SmvWorkspaceIndex = 8;
+
+    // Visible header: Browser, Devices, Events, Annunciator, GOOSE, SMV,
+    // Signal Testing, Diagnostics. Values are real MainTabs indices.
+    private static readonly int[] WorkspaceByButton = [7, 0, 2, 3, 4, 8, 6, 5];
+
+    public static int TabForButton(int button)
+        => button is >= 0 and < 8
+            ? WorkspaceByButton[button]
+            : throw new ArgumentOutOfRangeException(nameof(button));
+
+    public static int ButtonForTab(int tab)
+        => tab switch
+        {
+            7 => 0, // IED Browser
+            0 or 1 => 1, // Device Explorer and unreachable legacy Live Monitor
+            2 => 2, // Event Logs
+            3 => 3, // Annunciator
+            4 => 4, // GOOSE Sniff
+            8 => 5, // SMV
+            6 => 6, // Signal Testing
+            5 => 7, // Diagnostics
+            _ => 1 // Unspecified internal workspace is never shown as SMV
+        };
+}
diff --git a/MainWindow.IedSmvQuickStart.cs b/MainWindow.IedSmvQuickStart.cs
index 6e602641e..55cbeda2b 100644
--- a/MainWindow.IedSmvQuickStart.cs
+++ b/MainWindow.IedSmvQuickStart.cs
@@ -92,7 +92,26 @@ private void IedSmvQuickStart_Click(object sender, RoutedEventArgs e)
         if (sender is not Button { CommandParameter: Iec61850MonitorDevice device })
             return;
 
+        OpenSmvWorkspaceForDevice(device);
+    }
+
+    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.";
+    }
+
+    private void OpenSmvCapture_Click(object sender, RoutedEventArgs e)
+        => ActivateSelectedSmvWorkspace();
+
+    private void OpenSmvWorkspaceForDevice(Iec61850MonitorDevice device)
+    {
         SelectedDevice = device;
+        if (SmvWorkspaceStatus is not null)
+            SmvWorkspaceStatus.Text =
+                "SMV capture for " + device.Name + " · existing verified viewer";
 
         if (_activeSmvViewerWindow is { IsLoaded: true } existing)
         {
diff --git a/MainWindow.NavigationLayoutFix.cs b/MainWindow.NavigationLayoutFix.cs
index bf1ff226b..f087445d1 100644
--- a/MainWindow.NavigationLayoutFix.cs
+++ b/MainWindow.NavigationLayoutFix.cs
@@ -27,26 +27,26 @@ internal static class MainWindowNavigationLayoutFix
 
     private static readonly string[] FullLabels =
     [
-        "IEC 61850 Explorer",
-        "Live Monitor",
-        "Event Log",
-        "Alarm",
-        "GOOSE Subscriber",
-        "Diagnostics",
-        "FAT",
-        "IED Browser"
+        "IED Browser",
+        "Device Explorer",
+        "Event Logs",
+        "Annunciator",
+        "GOOSE Sniff",
+        "SMV",
+        "Signal Testing",
+        "Diagnostics"
     ];
 
     private static readonly string[] CompactLabels =
     [
-        "Explorer",
-        "Live",
+        "IED Browser",
+        "Devices",
         "Events",
         "Alarm",
         "GOOSE",
-        "Diagnostics",
-        "FAT",
-        "Browser"
+        "SMV",
+        "Testing",
+        "Diagnostics"
     ];
 
     [ModuleInitializer]
@@ -98,7 +98,7 @@ private static void OnMainWindowButtonClick(object sender, RoutedEventArgs e)
         if (sender is not MainWindow window || e.Source is not Button button)
             return;
 
-        if (button.Name is not ("NavExplorerButton" or "NavLiveButton" or "NavEventsButton" or "NavAlarmButton" or "NavGooseButton" or "NavDiagnosticsButton" or "NavNativeFatButton" or "NavIedBrowserButton"))
+        if (button.Name is not ("NavIedBrowserButton" or "NavExplorerButton" or "NavEventsButton" or "NavAlarmButton" or "NavGooseButton" or "NavSmvButton" or "NavNativeFatButton" or "NavDiagnosticsButton"))
             return;
 
         // A repeated click on the already-selected tab does not raise SelectionChanged,
@@ -160,7 +160,7 @@ private static void ApplyResponsiveLayout(MainWindow window)
 
             // Diagnostics owns a StackPanel containing its text plus the red alert
             // badge. Never replace that Content tree while changing layout density.
-            if (index != 5 && index < labels.Length)
+            if (index != 7 && index < labels.Length)
             {
                 // Preserve the operator SVG glyphs across Loaded/resize. Replacing
                 // Content here would silently erase icons declared in MainWindow.xaml.
@@ -189,14 +189,14 @@ private static void ApplyResponsiveLayout(MainWindow window)
     private static Button?[] GetNavigationButtons(MainWindow window)
         =>
         [
+            window.FindName("NavIedBrowserButton") as Button,
             window.FindName("NavExplorerButton") as Button,
-            window.FindName("NavLiveButton") as Button,
             window.FindName("NavEventsButton") as Button,
             window.FindName("NavAlarmButton") as Button,
             window.FindName("NavGooseButton") as Button,
-            window.FindName("NavDiagnosticsButton") as Button,
+            window.FindName("NavSmvButton") as Button,
             window.FindName("NavNativeFatButton") as Button,
-            window.FindName("NavIedBrowserButton") as Button
+            window.FindName("NavDiagnosticsButton") as Button
         ];
 
     private static void UpdatePillGeometry(MainWindow window, double shellWidth)
@@ -240,7 +240,7 @@ private static void PositionPill(MainWindow window, bool animate)
             contentWidth = Math.Max(0d, shell.Width - shell.Padding.Left - shell.Padding.Right);
 
         var cellWidth = contentWidth / 8d;
-        var target = Math.Clamp(tabs.SelectedIndex, 0, 7) * cellWidth;
+        var target = EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex) * cellWidth;
         pill.Width = Math.Max(1d, cellWidth - 2d);
 
         translate.BeginAnimation(TranslateTransform.XProperty, null);
diff --git a/MainWindow.xaml b/MainWindow.xaml
index c2ee8877a..24bc6d710 100644
--- a/MainWindow.xaml
+++ b/MainWindow.xaml
@@ -109,47 +109,47 @@
                             <DropShadowEffect BlurRadius="14" ShadowDepth="3" Opacity="0.18" Color="#2563EB"/>
                         </Border.Effect>
                     </Border>
-                    <Button x:Name="NavExplorerButton" Grid.Column="0" Tag="0" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="IEC 61850 Explorer">
+                    <Button x:Name="NavExplorerButton" Grid.Column="1" Tag="1" TabIndex="1" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Device Explorer">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorIecTopologyIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
-                            <TextBlock Text="IEC 61850 Explorer" VerticalAlignment="Center"/>
+                            <TextBlock Text="Device Explorer" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavLiveButton" Grid.Column="1" Tag="1" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Live Monitor">
+                    <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"/>
                             </Viewbox>
-                            <TextBlock Text="Live Monitor" VerticalAlignment="Center"/>
+                            <TextBlock Text="SMV" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavEventsButton" Grid.Column="2" Tag="2" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Event Log">
+                    <Button x:Name="NavEventsButton" Grid.Column="2" Tag="2" TabIndex="2" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Event Logs">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorEventLogIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
-                            <TextBlock Text="Event Log" VerticalAlignment="Center"/>
+                            <TextBlock Text="Event Logs" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavAlarmButton" Grid.Column="3" Tag="3" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Alarm">
+                    <Button x:Name="NavAlarmButton" Grid.Column="3" Tag="3" TabIndex="3" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Annunciator">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorAlarmIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
-                            <TextBlock Text="Alarm" VerticalAlignment="Center"/>
+                            <TextBlock Text="Annunciator" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavGooseButton" Grid.Column="4" Tag="4" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="GOOSE Subscriber">
+                    <Button x:Name="NavGooseButton" Grid.Column="4" Tag="4" TabIndex="4" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="GOOSE Sniff">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorIecWirelessIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
-                            <TextBlock Text="GOOSE Subscriber" VerticalAlignment="Center"/>
+                            <TextBlock Text="GOOSE Sniff" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavDiagnosticsButton" Grid.Column="5" Tag="5" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}">
+                    <Button x:Name="NavDiagnosticsButton" Grid.Column="7" Tag="7" TabIndex="7" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorDiagnosticsIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
@@ -163,15 +163,15 @@
                             </Border>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavNativeFatButton" Grid.Column="6" Tag="6" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="FAT">
+                    <Button x:Name="NavNativeFatButton" Grid.Column="6" Tag="6" TabIndex="6" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="Signal Testing">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorFatIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
                             </Viewbox>
-                            <TextBlock Text="FAT" VerticalAlignment="Center"/>
+                            <TextBlock Text="Signal Testing" VerticalAlignment="Center"/>
                         </StackPanel>
                     </Button>
-                    <Button x:Name="NavIedBrowserButton" Grid.Column="7" Tag="7" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="IED Browser">
+                    <Button x:Name="NavIedBrowserButton" Grid.Column="0" Tag="0" TabIndex="0" Click="NavButton_Click" Style="{StaticResource SegmentedNavButton}" ToolTip="IED Browser">
                         <StackPanel Orientation="Horizontal" VerticalAlignment="Center" HorizontalAlignment="Center">
                             <Viewbox Width="15" Height="15" Margin="0,0,5,0" IsHitTestVisible="False">
                                 <Path Data="{StaticResource OperatorIedBrowserIcon}" Fill="{Binding Foreground, RelativeSource={RelativeSource AncestorType={x:Type Button}}}" Stretch="Uniform"/>
@@ -191,7 +191,7 @@
                     Style="{StaticResource HiddenTabControl}"
                     SelectionChanged="MainTabs_SelectionChanged">
             <!-- IEC 61850 EXPLORER -->
-            <TabItem Header="IEC 61850 Explorer">
+            <TabItem Header="Device Explorer">
                 <Grid>
                     <Grid.ColumnDefinitions>
                         <ColumnDefinition Width="258"/>
@@ -930,7 +930,7 @@
             </TabItem>
 
             <!-- GLOBAL MULTI-IED LIVE MONITOR -->
-            <TabItem Header="Live Monitor">
+            <TabItem Header="Internal Live Monitor" Visibility="Collapsed" IsEnabled="False">
                 <Border Style="{StaticResource WorkspaceCard}" Padding="12">
                     <DockPanel>
                         <Grid DockPanel.Dock="Top" Margin="0,0,0,10">
@@ -2284,6 +2284,29 @@
                     </Grid>
                 </Border>
             </TabItem>
+
+            <!-- Sampled Values uses the existing, hardware-backed SMV viewer/capture workflow.
+                 The host is navigation/status only, not a duplicate SMV decoder. -->
+            <TabItem x:Name="SmvWorkspaceTab" Header="SMV">
+                <Border Style="{StaticResource WorkspaceCard}" Padding="12">
+                    <DockPanel>
+                        <StackPanel DockPanel.Dock="Top" Orientation="Horizontal" VerticalAlignment="Center">
+                            <StackPanel>
+                                <TextBlock Text="Sampled Values" Style="{StaticResource WorkspaceTitle}"/>
+                                <TextBlock Text="Capture and inspect IEC 61850-9-2 Sampled Values with the existing native SMV viewer."
+                                           Style="{StaticResource WorkspaceSubtitle}" Margin="0,2,0,0"/>
+                            </StackPanel>
+                            <Button Content="Open SMV Capture" Style="{StaticResource PrimaryButton}"
+                                    Margin="16,0,0,0" Padding="12,6"
+                                    Click="OpenSmvCapture_Click"
+                                    ToolTip="Reuse the current SMV viewer and preserve the active snapshot"/>
+                        </StackPanel>
+                        <TextBlock x:Name="SmvWorkspaceStatus" Margin="0,14,0,0" FontSize="12"
+                                   Foreground="{StaticResource Muted}"
+                                   Text="Select an IED in Device Explorer to launch the SMV capture workspace."/>
+                    </DockPanel>
+                </Border>
+            </TabItem>
         </TabControl>
 
         <Border Grid.Row="2" Margin="0,10,0,0" Background="#EAF1FF" BorderBrush="#CFE0FF" BorderThickness="1" CornerRadius="14" Padding="11,7">
diff --git a/MainWindow.xaml.cs b/MainWindow.xaml.cs
index ffe77297c..1aa9b24a6 100644
--- a/MainWindow.xaml.cs
+++ b/MainWindow.xaml.cs
@@ -818,9 +818,8 @@ private void NavButton_Click(object sender, RoutedEventArgs e)
     {
         if (sender is not Button button || !int.TryParse(button.Tag?.ToString(), out var index))
             return;
-        index = Math.Clamp(index, 0, IedBrowserWorkspaceIndex);
-        MainTabs.SelectedIndex = index;
-        UpdateNavigationVisuals(index, animate: true);
+        MainTabs.SelectedIndex = EngineeringNavigationRoute.TabForButton(index);
+        UpdateNavigationVisuals(MainTabs.SelectedIndex, animate: true);
     }
 
     private void MainTabs_SelectionChanged(object sender, SelectionChangedEventArgs e)
@@ -858,6 +857,10 @@ private void MainTabs_SelectionChanged(object sender, SelectionChangedEventArgs
         {
             ClearDiagnosticAlert();
         }
+        else if (MainTabs.SelectedIndex == EngineeringNavigationRoute.SmvWorkspaceIndex)
+        {
+            ActivateSelectedSmvWorkspace();
+        }
 
         UpdateNavigationVisuals(MainTabs.SelectedIndex, animate: true);
     }
@@ -867,9 +870,9 @@ private void UpdateNavigationVisuals(int index, bool animate)
         if (WorkflowPillTranslate == null)
             return;
 
-        index = Math.Clamp(index, 0, IedBrowserWorkspaceIndex);
+        index = EngineeringNavigationRoute.ButtonForTab(index);
 
-        // MainWindow is the single owner of all seven Engineering destinations.
+        // MainWindow is the single owner of all eight operator destinations.
         // Keep the same density used by the proven workstation shell while allowing
         // enough width for the Explorer label and the new canonical FAT sibling.
         var availableWidth = ActualWidth > 0d ? ActualWidth : 1480d;
@@ -898,14 +901,14 @@ private void UpdateNavigationVisuals(int index, bool animate)
 
         var buttons = new[]
         {
+            NavIedBrowserButton,
             NavExplorerButton,
-            NavLiveButton,
             NavEventsButton,
             NavAlarmButton,
             NavGooseButton,
-            NavDiagnosticsButton,
+            NavSmvButton,
             NavNativeFatButton,
-            NavIedBrowserButton
+            NavDiagnosticsButton
         };
         for (var i = 0; i < buttons.Length; i++)
             buttons[i].Foreground = i == index ? Brushes.White : new SolidColorBrush(Color.FromRgb(71, 84, 103));
diff --git a/P2IndustrialWorkstationUx.cs b/P2IndustrialWorkstationUx.cs
index 0d1e34f92..a42a39c40 100644
--- a/P2IndustrialWorkstationUx.cs
+++ b/P2IndustrialWorkstationUx.cs
@@ -262,7 +262,7 @@ private static bool Contains(string? value, string query)
     private static void DecorateMainNavigation(MainWindow window)
     {
         ApplyNavigationTemplate(window.FindName("NavExplorerButton") as Button, window, "IconExplorerNavContent");
-        ApplyNavigationTemplate(window.FindName("NavLiveButton") as Button, window, "IconMonitorNavContent");
+        ApplyNavigationTemplate(window.FindName("NavSmvButton") as Button, window, "IconMonitorNavContent");
         ApplyNavigationTemplate(window.FindName("NavEventsButton") as Button, window, "IconEventsNavContent");
         ApplyNavigationTemplate(window.FindName("NavGooseButton") as Button, window, "IconGooseNavContent");
         ApplyNavigationTemplate(window.FindName("NavDiagnosticsButton") as Button, window, "IconDiagnosticsNavContent");
diff --git a/SasOperationalUiPolicy.cs b/SasOperationalUiPolicy.cs
index d0d39f2d3..14b40bb66 100644
--- a/SasOperationalUiPolicy.cs
+++ b/SasOperationalUiPolicy.cs
@@ -24,7 +24,7 @@ internal static class SasOperationalUiPolicy
     private static readonly ConditionalWeakTable<object, object> FilteredViews = new();
     private static readonly string[] NavigationButtonNames =
     {
-        "NavExplorerButton", "NavLiveButton", "NavEventsButton", "NavAlarmButton", "NavGooseButton", "NavDiagnosticsButton", "NavNativeFatButton", "NavIedBrowserButton"
+        "NavIedBrowserButton", "NavExplorerButton", "NavEventsButton", "NavAlarmButton", "NavGooseButton", "NavSmvButton", "NavNativeFatButton", "NavDiagnosticsButton"
     };
 
     [ModuleInitializer]
@@ -149,7 +149,7 @@ private static void ApplyBallisticNavigation(Window window)
         {
             tabs.SelectionChanged -= OnTabSelectionChanged;
             tabs.SelectionChanged += OnTabSelectionChanged;
-            UpdateNavigation(buttons, tabs.SelectedIndex, pulse: false);
+            UpdateNavigation(buttons, EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex), pulse: false);
         }
         else
         {
@@ -170,7 +170,7 @@ private static void OnTabSelectionChanged(object sender, SelectionChangedEventAr
             .Where(button => button is not null)
             .Cast<Button>()
             .ToArray();
-        UpdateNavigation(buttons, tabs.SelectedIndex, pulse: true);
+        UpdateNavigation(buttons, EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex), pulse: true);
     }
 
     private static void OnNavigationClick(object sender, MouseButtonEventArgs args)
diff --git a/tests/ARSAS.Tests/AlarmAnnunciatorIntegrationRegressionTests.cs b/tests/ARSAS.Tests/AlarmAnnunciatorIntegrationRegressionTests.cs
index 2d667058b..fd4834af1 100644
--- a/tests/ARSAS.Tests/AlarmAnnunciatorIntegrationRegressionTests.cs
+++ b/tests/ARSAS.Tests/AlarmAnnunciatorIntegrationRegressionTests.cs
@@ -24,21 +24,21 @@ public void Header_UsesSevenWorkflowDestinations_WithoutDuplicateRuntimeStatusCh
         Assert.Contains(navGrid.Descendants(p + "Button"), button =>
             (string?)button.Attribute(x + "Name") == "NavAlarmButton" &&
             (string?)button.Attribute("Tag") == "3" &&
-            ((string?)button.Attribute("Content") == "Alarm" ||
+            ((string?)button.Attribute("Content") == "Annunciator" ||
              button.Descendants(p + "TextBlock").Any(label =>
-                 (string?)label.Attribute("Text") == "Alarm")));
+                 (string?)label.Attribute("Text") == "Annunciator")));
         Assert.Contains(navGrid.Descendants(p + "Button"), button =>
             (string?)button.Attribute(x + "Name") == "NavGooseButton" &&
             (string?)button.Attribute("Tag") == "4");
         Assert.Contains(navGrid.Descendants(p + "Button"), button =>
             (string?)button.Attribute(x + "Name") == "NavDiagnosticsButton" &&
-            (string?)button.Attribute("Tag") == "5");
+            (string?)button.Attribute("Tag") == "7");
         Assert.Contains(navGrid.Descendants(p + "Button"), button =>
             (string?)button.Attribute(x + "Name") == "NavNativeFatButton" &&
             (string?)button.Attribute("Tag") == "6" &&
-            ((string?)button.Attribute("Content") == "FAT" ||
+            ((string?)button.Attribute("Content") == "Signal Testing" ||
              button.Descendants(p + "TextBlock").Any(label =>
-                 (string?)label.Attribute("Text") == "FAT")));
+                 (string?)label.Attribute("Text") == "Signal Testing")));
 
         var headerSource = header.ToString(SaveOptions.DisableFormatting);
         Assert.DoesNotContain("ConnectionInsightText", headerSource, StringComparison.Ordinal);
@@ -54,8 +54,8 @@ public void BallisticNavbar_AppliesTheSameCapsuleContractToAlarm()
     {
         var source = File.ReadAllText(FindRepoFile("SasOperationalUiPolicy.cs"));
 
-        Assert.Contains("\"NavExplorerButton\", \"NavLiveButton\", \"NavEventsButton\", \"NavAlarmButton\", \"NavGooseButton\", \"NavDiagnosticsButton\", \"NavNativeFatButton\", \"NavIedBrowserButton\"", source, StringComparison.Ordinal);
-        Assert.Contains("UpdateNavigation(buttons, tabs.SelectedIndex", source, StringComparison.Ordinal);
+        Assert.Contains("\"NavIedBrowserButton\", \"NavExplorerButton\", \"NavEventsButton\", \"NavAlarmButton\", \"NavGooseButton\", \"NavSmvButton\", \"NavNativeFatButton\", \"NavDiagnosticsButton\"", source, StringComparison.Ordinal);
+        Assert.Contains("UpdateNavigation(buttons, EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex)", source, StringComparison.Ordinal);
         Assert.Contains("buttons[index].Background = selected ? AccentGradient()", source, StringComparison.Ordinal);
     }
 
@@ -137,13 +137,13 @@ public void NavigationAndDiagnosticsUseEightTabGeometry()
         var nativeFat = File.ReadAllText(FindRepoFile("MainWindow.NativeFatWorkspace.cs"));
 
         Assert.Contains("contentWidth / 8d", navigation, StringComparison.Ordinal);
-        Assert.Contains("Math.Clamp(tabs.SelectedIndex, 0, 7)", navigation, StringComparison.Ordinal);
+        Assert.Contains("EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex)", navigation, StringComparison.Ordinal);
         Assert.Contains("NavAlarmButton", navigation, StringComparison.Ordinal);
         Assert.Contains("NavNativeFatButton", navigation, StringComparison.Ordinal);
         Assert.Contains("MainTabs.SelectedIndex == 4", main, StringComparison.Ordinal);
         Assert.Contains("MainTabs.SelectedIndex == 5", main, StringComparison.Ordinal);
         Assert.Contains("private const int NativeFatWorkspaceIndex = 6", nativeFat, StringComparison.Ordinal);
-        Assert.Contains("Math.Clamp(index, 0, IedBrowserWorkspaceIndex)", main, StringComparison.Ordinal);
+        Assert.Contains("EngineeringNavigationRoute.TabForButton(index)", main, StringComparison.Ordinal);
     }
 
     [Fact]
diff --git a/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs b/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs
new file mode 100644
index 000000000..a385445fe
--- /dev/null
+++ b/tests/ARSAS.Tests/M214OperatorNavigationRoutingTests.cs
@@ -0,0 +1,88 @@
+using System.Xml.Linq;
+using ArIED61850Tester;
+
+namespace ARSAS.Tests;
+
+public sealed class M214OperatorNavigationRoutingTests
+{
+    private static readonly XNamespace P = "http://schemas.microsoft.com/winfx/2006/xaml/presentation";
+    private static readonly XNamespace X = "http://schemas.microsoft.com/winfx/2006/xaml";
+
+    [Theory]
+    [InlineData(0, 7)]
+    [InlineData(1, 0)]
+    [InlineData(2, 2)]
+    [InlineData(3, 3)]
+    [InlineData(4, 4)]
+    [InlineData(5, 8)]
+    [InlineData(6, 6)]
+    [InlineData(7, 5)]
+    public void EightOperatorDestinations_KeepStableWorkspaceRoutes(int button, int tab)
+    {
+        Assert.Equal(tab, EngineeringNavigationRoute.TabForButton(button));
+        Assert.Equal(button, EngineeringNavigationRoute.ButtonForTab(tab));
+    }
+
+    [Fact]
+    public void LegacyLiveMonitor_IsNotAnOperatorDestination()
+    {
+        Assert.Equal(1, EngineeringNavigationRoute.ButtonForTab(1));
+        Assert.DoesNotContain(Enumerable.Range(0, 8)
+            .Select(EngineeringNavigationRoute.TabForButton), tab => tab == 1);
+        Assert.Throws<ArgumentOutOfRangeException>(() =>
+            EngineeringNavigationRoute.TabForButton(8));
+    }
+
+    [Fact]
+    public void HeaderTabs_ExactlyMatchOperatorOrder_WithoutLosingLegacyWpfBindings()
+    {
+        var doc = XDocument.Load(Find("MainWindow.xaml"));
+        var header = doc.Descendants(P + "Grid").Single(g =>
+            (string?)g.Attribute(X + "Name") == "WorkflowNavGrid");
+        var buttons = header.Elements(P + "Button")
+            .OrderBy(b => (int?)b.Attribute("Grid.Column")).ToArray();
+        var actual = buttons.Select(b => b.Descendants(P + "TextBlock")
+            .First().Attribute("Text")?.Value).ToArray();
+        Assert.Equal(new[]
+        {
+            "IED Browser", "Device Explorer", "Event Logs", "Annunciator",
+            "GOOSE Sniff", "SMV", "Signal Testing", "Diagnostics"
+        }, actual);
+        Assert.Equal(8, buttons.Length);
+        for (var i = 0; i < buttons.Length; i++)
+        {
+            Assert.Equal(i.ToString(), (string?)buttons[i].Attribute("Tag"));
+            Assert.Equal(i.ToString(), (string?)buttons[i].Attribute("TabIndex"));
+        }
+        var tabs = doc.Descendants(P + "TabControl").Single(g =>
+            (string?)g.Attribute(X + "Name") == "MainTabs")
+            .Elements(P + "TabItem").ToArray();
+        Assert.Equal(9, tabs.Length); // 8 destinations + internal legacy view
+        Assert.Equal("Internal Live Monitor", (string?)tabs[1].Attribute("Header"));
+        Assert.Equal("Collapsed", (string?)tabs[1].Attribute("Visibility"));
+        Assert.Equal("SMV", (string?)tabs[8].Attribute("Header"));
+        Assert.Equal("IED Browser", (string?)tabs[7].Attribute("Header"));
+        Assert.DoesNotContain(buttons, b =>
+            ((string?)b.Attribute(X + "Name")) == "NavLiveButton");
+    }
+
+    [Fact]
+    public void SmvNav_ReusesExistingDeviceViewer_NotAnotherDecoderOrPoller()
+    {
+        var source = File.ReadAllText(Find("MainWindow.IedSmvQuickStart.cs"));
+        Assert.Contains("OpenSmvWorkspaceForDevice(device);", source);
+        Assert.Contains("SmvViewerWindow(device)", source);
+        Assert.Contains("EnableFastWorkflow(adapter, routeDetail)", source);
+        Assert.DoesNotContain("new MmsClientSession", source);
+    }
+
+    private static string Find(string path)
+    {
+        for (DirectoryInfo? d = new(AppContext.BaseDirectory); d != null; d = d.Parent)
+        {
+            var file = Path.Combine(d.FullName, path);
+            if (File.Exists(file)) return file;
+        }
+        throw new FileNotFoundException(path);
+    }
+}
diff --git a/tests/ARSAS.Tests/MainWindowTopBarLayoutRegressionTests.cs b/tests/ARSAS.Tests/MainWindowTopBarLayoutRegressionTests.cs
index d08f9a3b9..35286a71c 100644
--- a/tests/ARSAS.Tests/MainWindowTopBarLayoutRegressionTests.cs
+++ b/tests/ARSAS.Tests/MainWindowTopBarLayoutRegressionTests.cs
@@ -10,10 +10,10 @@ public void NavigationLayout_UsesResponsiveWidthsAndConsistentEightDestinationGe
         Assert.Contains("WideNavWidth = 1150d", source, StringComparison.Ordinal);
         Assert.Contains("MediumNavWidth = 1010d", source, StringComparison.Ordinal);
         Assert.Contains("CompactNavWidth = 842d", source, StringComparison.Ordinal);
-        Assert.Contains("\"IEC 61850 Explorer\"", source, StringComparison.Ordinal);
-        Assert.Contains("\"Alarm\"", source, StringComparison.Ordinal);
+        Assert.Contains("\"Device Explorer\"", source, StringComparison.Ordinal);
+        Assert.Contains("\"Annunciator\"", source, StringComparison.Ordinal);
         Assert.DoesNotContain("\"Alarm Annunciator\"", source, StringComparison.Ordinal);
-        Assert.Contains("\"GOOSE Subscriber\"", source, StringComparison.Ordinal);
+        Assert.Contains("\"GOOSE Sniff\"", source, StringComparison.Ordinal);
         Assert.Contains("NavNativeFatButton", source, StringComparison.Ordinal);
         Assert.Contains("NavIedBrowserButton", source, StringComparison.Ordinal);
         Assert.Contains("var labels = wide ? FullLabels : CompactLabels", source, StringComparison.Ordinal);
@@ -25,7 +25,7 @@ public void SelectionPill_IsDerivedFromActualEightCellNavWidth_NotFixed150Pixels
         var source = File.ReadAllText(FindRepoFile("MainWindow.NavigationLayoutFix.cs"));
 
         Assert.Contains("var cellWidth = contentWidth / 8d", source, StringComparison.Ordinal);
-        Assert.Contains("Math.Clamp(tabs.SelectedIndex, 0, 7) * cellWidth", source, StringComparison.Ordinal);
+        Assert.Contains("EngineeringNavigationRoute.ButtonForTab(tabs.SelectedIndex) * cellWidth", source, StringComparison.Ordinal);
         Assert.Contains("pill.Width = Math.Max(1d, cellWidth - 2d)", source, StringComparison.Ordinal);
         Assert.Contains("FindName(\"WorkflowPillTranslate\") as TranslateTransform", source, StringComparison.Ordinal);
         Assert.Contains("pill.RenderTransform is TransformGroup", source, StringComparison.Ordinal);
@@ -57,7 +57,7 @@ public void ResponsiveLabels_DoNotReplaceDiagnosticsAlertContentTree()
         var source = File.ReadAllText(FindRepoFile("MainWindow.NavigationLayoutFix.cs"));
         var xaml = File.ReadAllText(FindRepoFile("MainWindow.xaml"));
 
-        Assert.Contains("if (index != 5 && index < labels.Length)", source, StringComparison.Ordinal);
+        Assert.Contains("if (index != 7 && index < labels.Length)", source, StringComparison.Ordinal);
         Assert.Contains("NavDiagnosticsButton", source, StringComparison.Ordinal);
         Assert.Contains("DiagnosticsAlertVisibility", xaml, StringComparison.Ordinal);
         Assert.DoesNotContain("button.Content = labels[index];\n            button.MinHeight", source, StringComparison.Ordinal);
diff --git a/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs b/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
index f663cc37a..768c59481 100644
--- a/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
+++ b/tests/ARSAS.Tests/MaterialIconConsistencyTests.cs
@@ -17,14 +17,14 @@ public sealed class MaterialIconConsistencyTests
     private static readonly XNamespace X = "http://schemas.microsoft.com/winfx/2006/xaml";
 
     [Theory]
-    [InlineData("NavExplorerButton", "0", "OperatorIecTopologyIcon")]
-    [InlineData("NavLiveButton", "1", "OperatorLiveMonitorIcon")]
+    [InlineData("NavExplorerButton", "1", "OperatorIecTopologyIcon")]
+    [InlineData("NavSmvButton", "5", "OperatorLiveMonitorIcon")]
     [InlineData("NavEventsButton", "2", "OperatorEventLogIcon")]
     [InlineData("NavAlarmButton", "3", "OperatorAlarmIcon")]
     [InlineData("NavGooseButton", "4", "OperatorIecWirelessIcon")]
-    [InlineData("NavDiagnosticsButton", "5", "OperatorDiagnosticsIcon")]
+    [InlineData("NavDiagnosticsButton", "7", "OperatorDiagnosticsIcon")]
     [InlineData("NavNativeFatButton", "6", "OperatorFatIcon")]
-    [InlineData("NavIedBrowserButton", "7", "OperatorIedBrowserIcon")]
+    [InlineData("NavIedBrowserButton", "0", "OperatorIedBrowserIcon")]
     public void EveryNavigationDestinationOwnsOneGlyphAndSameClickHandler(
         string buttonName, string index, string glyph)
     {
diff --git a/tests/ARSAS.Tests/OperatorHeaderIconRegressionTests.cs b/tests/ARSAS.Tests/OperatorHeaderIconRegressionTests.cs
index cc2f8f11e..c5636194c 100644
--- a/tests/ARSAS.Tests/OperatorHeaderIconRegressionTests.cs
+++ b/tests/ARSAS.Tests/OperatorHeaderIconRegressionTests.cs
@@ -37,10 +37,10 @@ public void SixOperatorSvgGeometries_AreDeclaredOnce_WithUsableContours()
     }
 
     [Theory]
-    [InlineData("NavIedBrowserButton", "7", "IED Browser", "OperatorIedBrowserIcon")]
-    [InlineData("NavNativeFatButton", "6", "FAT", "OperatorFatIcon")]
-    [InlineData("NavAlarmButton", "3", "Alarm", "OperatorAlarmIcon")]
-    [InlineData("NavEventsButton", "2", "Event Log", "OperatorEventLogIcon")]
+    [InlineData("NavIedBrowserButton", "0", "IED Browser", "OperatorIedBrowserIcon")]
+    [InlineData("NavNativeFatButton", "6", "Signal Testing", "OperatorFatIcon")]
+    [InlineData("NavAlarmButton", "3", "Annunciator", "OperatorAlarmIcon")]
+    [InlineData("NavEventsButton", "2", "Event Logs", "OperatorEventLogIcon")]
     public void HeaderTabs_PreserveClickIndices_AndTrackButtonForeground(
         string buttonName, string expectedIndex, string caption, string icon)
     {
diff --git a/tests/ARSAS.Tests/P109IedBrowserAndEventDrawerContractTests.cs b/tests/ARSAS.Tests/P109IedBrowserAndEventDrawerContractTests.cs
index 9d2234b59..5ec98732d 100644
--- a/tests/ARSAS.Tests/P109IedBrowserAndEventDrawerContractTests.cs
+++ b/tests/ARSAS.Tests/P109IedBrowserAndEventDrawerContractTests.cs
@@ -6,12 +6,12 @@ namespace ARSAS.Tests;
 public sealed class P109IedBrowserAndEventDrawerContractTests
 {
     [Fact]
-    public void BrowserIsAnEighthPermanentNativeTab_WithoutRenumberingExistingWorkflows()
+    public void BrowserIsFirstOperatorDestination_WithoutRenumberingItsNativeWorkspace()
     {
         var xaml = Read("MainWindow.xaml");
         var code = Read("MainWindow.IedBrowser.cs");
         Assert.Contains("x:Name=\"IedBrowserTab\" Header=\"IED Browser\"", xaml);
-        Assert.Contains("x:Name=\"NavIedBrowserButton\" Grid.Column=\"7\"", xaml);
+        Assert.Contains("x:Name=\"NavIedBrowserButton\" Grid.Column=\"0\"", xaml);
         Assert.Contains("x:Name=\"NativeFatTab\" Header=\"FAT\"", xaml);
         Assert.Contains("x:Name=\"IedBrowserTreeGrid\"", xaml);
         Assert.Contains("x:Name=\"IedBrowserDetailList\"", xaml);
diff --git a/tests/ARSAS.Tests/ProductionFatEngineeringTabRegressionTests.cs b/tests/ARSAS.Tests/ProductionFatEngineeringTabRegressionTests.cs
index d6e1f00d8..d8a809970 100644
--- a/tests/ARSAS.Tests/ProductionFatEngineeringTabRegressionTests.cs
+++ b/tests/ARSAS.Tests/ProductionFatEngineeringTabRegressionTests.cs
@@ -60,13 +60,13 @@ public void SeventhFatDestination_IsCanonicalMainWindowSiblingWithOneNavigationO
         Assert.Equal("NavButton_Click", (string?)fatButton.Attribute("Click"));
         Assert.Equal("{StaticResource SegmentedNavButton}", (string?)fatButton.Attribute("Style"));
         Assert.Contains(fatButton.Descendants(p + "TextBlock"),
-            label => (string?)label.Attribute("Text") == "FAT");
+            label => (string?)label.Attribute("Text") == "Signal Testing");
         Assert.Contains(fatButton.Descendants(p + "Path"),
             path => (string?)path.Attribute("Data") == "{StaticResource OperatorFatIcon}");
         Assert.Contains("Grid.ColumnSpan=\"8\"", xaml, StringComparison.Ordinal);
         Assert.Contains("x:Name=\"NativeFatTab\" Header=\"FAT\"", xaml, StringComparison.Ordinal);
 
-        Assert.Contains("Math.Clamp(index, 0, IedBrowserWorkspaceIndex)", mainSource, StringComparison.Ordinal);
+        Assert.Contains("EngineeringNavigationRoute.TabForButton(index)", mainSource, StringComparison.Ordinal);
         Assert.Contains("var cellWidth = contentWidth / 8d", mainSource, StringComparison.Ordinal);
         Assert.Contains("NavNativeFatButton", mainSource, StringComparison.Ordinal);