diff --git a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
index 25f49a3..1bd772b 100644
--- a/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
+++ b/Meade.net.Telescope.UnitTests/TelescopeUnitTests.cs
@@ -1356,6 +1356,29 @@ namespace Meade.net.Telescope.UnitTests
             Assert.That(exception.Message, Is.EqualTo("Unable to PulseGuide while moving same axis."));
         }
 
+        [TestCase(GuideDirections.guideEast)]
+        [TestCase(GuideDirections.guideWest)]
+        [TestCase(GuideDirections.guideNorth)]
+        [TestCase(GuideDirections.guideSouth)]
+        public void PulseGuide_WhenConnectedAndNewerPulseGuidingNotAvailable_ThenIsSlewingRespondsFalse(GuideDirections direction)
+        {
+            var duration = 0;
+            _sharedResourcesWrapperMock.Setup(x => x.ProductName).Returns(() => TelescopeList.Autostar497);
+            _sharedResourcesWrapperMock.Setup(x => x.FirmwareVersion).Returns(() => TelescopeList.Autostar497_30Ee);
+
+            var isSlewing = true;
+            _utilMock.Setup(x => x.WaitForMilliseconds(duration)).Callback(() =>
+                {
+                    isSlewing = _telescope.Slewing;
+                });
+
+            _telescope.Connected = true;
+
+            _telescope.PulseGuide(direction, duration);
+            
+            Assert.That(isSlewing, Is.False);
+        }
+
         [TestCase(GuideDirections.guideEast)]
         [TestCase(GuideDirections.guideWest)]
         [TestCase(GuideDirections.guideNorth)]
diff --git a/Meade.net.Telescope/Telescope.cs b/Meade.net.Telescope/Telescope.cs
index f1d55f0..8a41f33 100644
--- a/Meade.net.Telescope/Telescope.cs
+++ b/Meade.net.Telescope/Telescope.cs
@@ -134,7 +134,8 @@ namespace ASCOM.Meade.net
         }
 
         private double _guideRate;
-        
+        private bool _isGuiding = false;
+
         private void Initialise()
         {
             //todo move the TraceLogger out to a factory class.
@@ -1459,28 +1460,36 @@ namespace ASCOM.Meade.net
             }
             else
             {
-                switch (direction)
+                _isGuiding = true;
+                try
                 {
-                    case GuideDirections.guideEast:
-                        MoveAxis(TelescopeAxes.axisPrimary, 1);
-                        _utilities.WaitForMilliseconds(duration);
-                        MoveAxis(TelescopeAxes.axisPrimary, 0);
-                        break;
-                    case GuideDirections.guideNorth:
-                        MoveAxis(TelescopeAxes.axisSecondary, 1);
-                        _utilities.WaitForMilliseconds(duration);
-                        MoveAxis(TelescopeAxes.axisSecondary, 0);
-                        break;
-                    case GuideDirections.guideSouth:
-                        MoveAxis(TelescopeAxes.axisSecondary, -1);
-                        _utilities.WaitForMilliseconds(duration);
-                        MoveAxis(TelescopeAxes.axisSecondary, 0);
-                        break;
-                    case GuideDirections.guideWest:
-                        MoveAxis(TelescopeAxes.axisPrimary, -1);
-                        _utilities.WaitForMilliseconds(duration);
-                        MoveAxis(TelescopeAxes.axisPrimary, 0);
-                        break;
+                    switch (direction)
+                    {
+                        case GuideDirections.guideEast:
+                            MoveAxis(TelescopeAxes.axisPrimary, 1);
+                            _utilities.WaitForMilliseconds(duration);
+                            MoveAxis(TelescopeAxes.axisPrimary, 0);
+                            break;
+                        case GuideDirections.guideNorth:
+                            MoveAxis(TelescopeAxes.axisSecondary, 1);
+                            _utilities.WaitForMilliseconds(duration);
+                            MoveAxis(TelescopeAxes.axisSecondary, 0);
+                            break;
+                        case GuideDirections.guideSouth:
+                            MoveAxis(TelescopeAxes.axisSecondary, -1);
+                            _utilities.WaitForMilliseconds(duration);
+                            MoveAxis(TelescopeAxes.axisSecondary, 0);
+                            break;
+                        case GuideDirections.guideWest:
+                            MoveAxis(TelescopeAxes.axisPrimary, -1);
+                            _utilities.WaitForMilliseconds(duration);
+                            MoveAxis(TelescopeAxes.axisPrimary, 0);
+                            break;
+                    }
+                }
+                finally
+                {
+                    _isGuiding = false;
                 }
             }
 
@@ -1924,6 +1933,9 @@ namespace ASCOM.Meade.net
 
         private bool MovingAxis()
         {
+            if (_isGuiding)
+                return false;
+
             return _movingPrimary || _movingSecondary;
         }
 
@@ -1945,6 +1957,9 @@ namespace ASCOM.Meade.net
         {
             CheckConnected("Slewing Get");
 
+            if (_isGuiding)
+                return false;
+
             var result = _sharedResourcesWrapper.SendString("#:D#");
             //:D# Requests a string of bars indicating the distance to the current target location.
             //Returns: