diff --git a/Liner/Liner/DrawingObjectShip.cs b/Liner/Liner/DrawingObjectShip.cs
index 55f54e5..758177d 100644
--- a/Liner/Liner/DrawingObjectShip.cs
+++ b/Liner/Liner/DrawingObjectShip.cs
@@ -36,13 +36,18 @@ namespace Liner
 
         public bool Equals(IDrawingObject? other)
         {
-            if (other is not DrawingObjectShip otherShip)
+            if (other == null)
+            {
+                return false;
+            }
+            var otherShip = other as DrawingObjectShip;
+            if (otherShip == null)
             {
                 return false;
             }
             var ship = _ship.Ship;
             var otherShipShip = otherShip._ship.Ship;
-            if (ship.GetType() != otherShipShip.GetType())
+            if (ship.GetType().Name != otherShipShip.GetType().Name)
             {
                 return false;
             }
@@ -76,4 +81,6 @@ namespace Liner
             return true;
         }
     }
+
+    }
 }