Index: Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs
===================================================================
diff -u -r2e826fe82412e8333f9d4cb2e2eece2f3b3c6509 -rd2de88a141d3ba20d1f3b301a3c38723b682b206
--- Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision 2e826fe82412e8333f9d4cb2e2eece2f3b3c6509)
+++ Ringtoets/GrassCoverErosionInwards/src/Ringtoets.GrassCoverErosionInwards.Data/GrassCoverErosionInwardsInput.cs	(.../GrassCoverErosionInwardsInput.cs)	(revision d2de88a141d3ba20d1f3b301a3c38723b682b206)
@@ -36,13 +36,15 @@
     public class GrassCoverErosionInwardsInput : Observable, ICalculationInput
     {
         private IEnumerable<RoughnessProfileSection> geometry;
+        private RoundedDouble orientation;
 
         /// <summary>
         /// Creates a new instance of <see cref="GrassCoverErosionInwardsInput"/>.
         /// </summary>
         public GrassCoverErosionInwardsInput()
         {
             BreakWater = new List<BreakWater>();
+            orientation = new RoundedDouble(2);
         }
 
         /// <summary>
@@ -70,7 +72,17 @@
         /// <summary>
         /// Gets or sets the dike's orientation
         /// </summary>
-        public RoundedDouble Orientation { get; set; }
+        public RoundedDouble Orientation
+        {
+            get
+            {
+                return orientation;
+            }
+            set
+            {
+                orientation = value.ToPrecision(orientation.NumberOfDecimalPlaces);
+            }
+        }
 
         /// <summary>
         /// Gets or sets the dike's critical flow rate.
@@ -101,7 +113,7 @@
         /// <summary>
         /// Gets or sets the <see cref="BreakWater"/>.
         /// </summary>
-        public IEnumerable<BreakWater> BreakWater { get; set; }
+        public IList<BreakWater> BreakWater { get; set; }
 
         /// <summary>
         /// Gets or set the hydraulic boundary location from which to use the assessment level.