diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/simulator/streamlets/Swarm.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/simulator/streamlets/Swarm.java
index 337e309efc1..1a7ce6d46c7 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/simulator/streamlets/Swarm.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/simulator/streamlets/Swarm.java
@@ -78,7 +78,7 @@ public class Swarm implements TimeListener {
         timePoint = timer.getTime();
         cosineOfAverageLatitude = 1.0; // default to equator
         diffPx = new Vector(0, 0);
-        valueRange = new ValueRangeFlexibleBoundaries(/*wind speed in knots*/ 0.0,/*wind speed in knots*/ 60.0, /*percentage*/ 0.2);
+        valueRange = new ValueRangeFlexibleBoundaries(/*wind speed in knots*/ 0.0,/*wind speed in knots*/ 60.0, /*percentage*/ 0.15);
         colorMapper = new ColorMapper(valueRange, !colored);
     }