diff --git a/java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/impl/components/FoilingSegmentRetrievalProcessor.java b/java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/impl/components/FoilingSegmentRetrievalProcessor.java
index b1299beed75..34d29f5705d 100755
--- a/java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/impl/components/FoilingSegmentRetrievalProcessor.java
+++ b/java/com.sap.sailing.datamining/src/com/sap/sailing/datamining/impl/components/FoilingSegmentRetrievalProcessor.java
@@ -51,7 +51,7 @@ public class FoilingSegmentRetrievalProcessor extends AbstractRetrievalProcessor
                 TimePoint startOfSegment = null;
                 bravoFixTrack.lockForRead();
                 try {
-                    for (final BravoFix bravoFix : bravoFixTrack.getFixes(startOfRace, /* fromInclusive */ true, end, /* toInclusive */ false)) {
+                    for (final BravoFix bravoFix : bravoFixTrack.getFixes(startOfRace, /* fromInclusive */ true, end, /* toInclusive */ false)) { //geht ganzes Rennen durch
                         if (isAborted()) {
                             break;
                         }
@@ -61,10 +61,10 @@ public class FoilingSegmentRetrievalProcessor extends AbstractRetrievalProcessor
                                                 element.getTrackedRaceContext().getTrackedRace().getTrack(element.getCompetitor()).getEstimatedSpeed(bravoFix.getTimePoint())) <= 0)) ||
                                 (settings.getMaximumSpeedNotFoiling() != null && settings.getMaximumSpeedNotFoiling().compareTo(
                                         element.getTrackedRaceContext().getTrackedRace().getTrack(element.getCompetitor()).getEstimatedSpeed(bravoFix.getTimePoint())) <= 0);
-                        if (currentFixIsFoiling != isFoiling) {
-                            if (currentFixIsFoiling) {
+                        if (currentFixIsFoiling != isFoiling) { //checken ob boot zum loop davor mit voherigem fix immernoch am fliegen ist, wenn nicht dann muss segment gemacht werden, wenn ja dann wird es zum segment ergänzt
+                            if (currentFixIsFoiling) { //wenn ich vorher nicht am fliegen war und jetzt schon start von segment 
                                 startOfSegment = bravoFix.getTimePoint();
-                            } else {
+                            } else { // wenn ich vorher am fliegen war und jetzt nicht mehr, segment muss gebildet werden!!!!!
                                 if (settings.getMinimumFoilingSegmentDuration() == null ||
                                         startOfSegment.until(last).compareTo(settings.getMinimumFoilingSegmentDuration()) >= 0) {
                                     addOrMergeFoilingSegment(element, foilingSegments, bravoFixTrack, startOfSegment,
@@ -72,7 +72,7 @@ public class FoilingSegmentRetrievalProcessor extends AbstractRetrievalProcessor
                                 }
                                 startOfSegment = null;
                             }
-                            isFoiling = currentFixIsFoiling;
+                            isFoiling = currentFixIsFoiling; //aktualisiert das es vorher nicht gleich war also entweder fliegen zuende oder gerade beginnt
                         }
                         last = bravoFix.getTimePoint();
                     }
diff --git a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/GPSFixTrack.java b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/GPSFixTrack.java
index 59a02fe5d2f..a6edcda84e5 100755
--- a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/GPSFixTrack.java
+++ b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/GPSFixTrack.java
@@ -197,5 +197,15 @@ public interface GPSFixTrack<ItemType, FixType extends GPSFix> extends MappedTra
      * {@link #getFixes()} if and only if this method returns {@code true}.
      */
     boolean isValid(FixType e);
+    //TODO: Morgen
+//    /**
+//     * The time spent on TackType during the time range provided
+//     */
+//    Duration getTimeSpentTackType(TimePoint from, TimePoint to);
+//
+//    /**
+//     * The distance sailed on TackType during the time range provided
+//     */
+//    Distance getDistanceSpentTackType(TimePoint from, TimePoint to);
 
 }
diff --git a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/GPSFixTrackImpl.java b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/GPSFixTrackImpl.java
index 3c4fb1a3dad..2b6d8355b22 100755
--- a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/GPSFixTrackImpl.java
+++ b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/tracking/impl/GPSFixTrackImpl.java
@@ -29,6 +29,7 @@ import com.sap.sailing.domain.common.confidence.Weigher;
 import com.sap.sailing.domain.common.confidence.impl.BearingWithConfidenceImpl;
 import com.sap.sailing.domain.common.impl.KnotSpeedWithBearingImpl;
 import com.sap.sailing.domain.common.impl.NauticalMileDistance;
+import com.sap.sailing.domain.common.tracking.BravoFix;
 import com.sap.sailing.domain.common.tracking.GPSFix;
 import com.sap.sailing.domain.common.tracking.GPSFixMoving;
 import com.sap.sailing.domain.common.tracking.WithValidityCache;
@@ -1214,4 +1215,30 @@ public abstract class GPSFixTrackImpl<ItemType, FixType extends GPSFix> extends
         }
         return new SpeedWithBearingStepsIterable(speedWithBearingSteps);
     }
+    
+    private transient TimeRangeCache<Duration> tackTypeTimeCache;
+    
+    private transient TimeRangeCache<Distance> tackTypeDistanceCache;
+    //TODO: Morgen
+//    @Override
+//    public Duration getTimeSpentTackType(TimePoint from, TimePoint to) {
+//        return getValueSum(from, to, /* nullElement */ Duration.NULL, Duration::plus, tackTypeTimeCache,
+//                /* valueCalculator */ new Track.TimeRangeValueCalculator<Duration>() {
+//            @Override
+//            public Duration calculate(TimePoint from, TimePoint to) {
+//                Duration result = Duration.NULL;
+//                TimePoint last = from;
+//                boolean isTackType = false;
+//                for (final GPSFix fix : getFixes(from, true, to, true)) {
+//                    final boolean fixFoils = fix.isTackType(getTrackedRace().);
+//                    if (isTackType && fixFoils) {
+//                        result = result.plus(last.until(fix.getTimePoint()));
+//                    }
+//                    last = fix.getTimePoint();
+//                    isTackType = fixFoils;
+//                }
+//                return result;
+//            }
+//        });
+//    }
 }