I've added an equals method that takes into consideration only the object's position and timepoint.

java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/shared/SimulatorWindDTO.java

@@ -4,19 +4,49 @@ import com.google.gwt.user.client.rpc.IsSerializable;
 
 public class SimulatorWindDTO implements IsSerializable {
     public boolean isTurn;
-    //public Double trueWindSpeedInMetersPerSecond;
     public Double trueWindSpeedInKnots;
     public Double trueWindBearingDeg;
-    //public Double trueWindFromDeg;
-    //public Double dampenedTrueWindSpeedInMetersPerSecond;
-    //public Double dampenedTrueWindSpeedInKnots;
-    //public Double dampenedTrueWindBearingDeg;
-    //public Double dampenedTrueWindFromDeg;
     public PositionDTO position;
     public Long timepoint;
-    //public Long originTimepoint;
-    //public Double confidence;
 
     public SimulatorWindDTO() {
     }
+
+    @Override
+    public int hashCode() {
+
+        final int prime = 31;
+        int result = 1;
+
+        long temp = 0;
+
+        temp = this.trueWindSpeedInKnots.intValue();
+        result = prime * result + (int) (temp ^ (temp >>> 32));
+
+        temp = this.trueWindBearingDeg.intValue();
+        result = prime * result + (int) (temp ^ (temp >>> 32));
+
+        temp = this.timepoint.intValue();
+        result = prime * result + (int) (temp ^ (temp >>> 32));
+
+        temp = this.position.hashCode();
+        result = prime * result + (int) (temp ^ (temp >>> 32));
+
+        return result;
+
+    }
+
+    @Override
+    public boolean equals(final Object o) {
+        if (o == null) {
+            return false;
+        } else {
+            if (o instanceof SimulatorWindDTO) {
+                final SimulatorWindDTO other = (SimulatorWindDTO) o;
+
+                return this.position.equals(other.position) && (Math.abs(this.timepoint - other.timepoint) < 9999);
+            }
+            return false;
+        }
+    }
 }