diff --git a/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/RaceCell.java b/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/RaceCell.java
index d86e479054a..a90347df508 100644
--- a/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/RaceCell.java
+++ b/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/RaceCell.java
@@ -1,6 +1,5 @@
 package com.sap.sailing.domain.base.racegroup;
 
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.common.Named;
 import com.sap.sailing.domain.racelog.RaceLog;
 
@@ -13,6 +12,4 @@ import com.sap.sailing.domain.racelog.RaceLog;
  */
 public interface RaceCell extends Named {
     RaceLog getRaceLog();
-    
-    Iterable<Competitor> getCompetitors();
 }
diff --git a/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/impl/RaceCellImpl.java b/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/impl/RaceCellImpl.java
index 6d9a3b0a9b7..82fdd4a2fa7 100644
--- a/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/impl/RaceCellImpl.java
+++ b/java/com.sap.sailing.domain.shared.android/src/com/sap/sailing/domain/base/racegroup/impl/RaceCellImpl.java
@@ -1,6 +1,5 @@
 package com.sap.sailing.domain.base.racegroup.impl;
 
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.racegroup.RaceCell;
 import com.sap.sailing.domain.common.impl.NamedImpl;
 import com.sap.sailing.domain.racelog.RaceLog;
@@ -9,12 +8,10 @@ public class RaceCellImpl extends NamedImpl implements RaceCell {
     private static final long serialVersionUID = 971598420407273594L;
 
     private RaceLog raceLog;
-    private Iterable<Competitor> competitors;
 
-    public RaceCellImpl(String name, RaceLog raceLog, Iterable<Competitor> competitors) {
+    public RaceCellImpl(String name, RaceLog raceLog) {
         super(name);
         this.raceLog = raceLog;
-        this.competitors = competitors;
     }
 
     @Override
@@ -22,9 +19,4 @@ public class RaceCellImpl extends NamedImpl implements RaceCell {
         return raceLog;
     }
 
-    @Override
-    public Iterable<Competitor> getCompetitors() {
-        return competitors;
-    }
-
 }
diff --git a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/base/impl/CourseImpl.java b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/base/impl/CourseImpl.java
index 3caaaafd5bc..5847a1ab27a 100755
--- a/java/com.sap.sailing.domain/src/com/sap/sailing/domain/base/impl/CourseImpl.java
+++ b/java/com.sap.sailing.domain/src/com/sap/sailing/domain/base/impl/CourseImpl.java
@@ -3,6 +3,7 @@ package com.sap.sailing.domain.base.impl;
 import java.io.IOException;
 import java.io.ObjectInputStream;
 import java.io.ObjectOutputStream;
+import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.HashMap;
 import java.util.HashSet;
@@ -43,8 +44,16 @@ public class CourseImpl extends NamedImpl implements Course {
     private transient Set<CourseListener> listeners;
     private transient NamedReentrantReadWriteLock lock;
     
+    /**
+     * This monitor is used to serialize calls to {@link #update(List, DomainFactory)}. This helps to guarantee that
+     * the transition from a read lock to a write lock, in case a write is actually needed, isn't interrupted by any other
+     * call to {@link #update(List, DomainFactory)}.
+     */
+    private final Serializable updateMonitor;
+    
     public CourseImpl(String name, Iterable<Waypoint> waypoints) {
         super(name);
+        updateMonitor = ""; 
         lock = new NamedReentrantReadWriteLock("lock for CourseImpl "+name,
                 /* fair */ true); // if non-fair, course update may need to wait forever for many concurrent readers
         listeners = new HashSet<CourseListener>();
@@ -320,7 +329,7 @@ public class CourseImpl extends NamedImpl implements Course {
     }
 
     @Override
-    public synchronized Waypoint getWaypointForControlPoint(ControlPoint controlPoint, int start) {
+    public Waypoint getWaypointForControlPoint(ControlPoint controlPoint, int start) {
         lockForRead();
         try {
             if (start > legs.size()) {
@@ -372,44 +381,51 @@ public class CourseImpl extends NamedImpl implements Course {
 
     @Override
     public void update(List<Pair<ControlPoint, NauticalSide>> newControlPoints, DomainFactory baseDomainFactory) throws PatchFailedException {
-        LockUtil.lockForWrite(lock);
-        try {
-            Iterable<Waypoint> courseWaypoints = getWaypoints();
-            List<Waypoint> newWaypointList = new LinkedList<Waypoint>();
-            // key existing waypoints by control points and re-use each one at most once during construction of the
-            // new waypoint list; since several waypoints can have the same control point, the map goes from
-            // control point to List<Waypoint>. The waypoints in the lists are held in the order of their
-            // occurrence in courseToUpdate.getWaypoints().
-            Map<com.sap.sailing.domain.base.ControlPoint, List<Waypoint>> existingWaypointsByControlPoint =
-                    new HashMap<com.sap.sailing.domain.base.ControlPoint, List<Waypoint>>();
-            for (Waypoint waypoint : courseWaypoints) {
-                List<Waypoint> wpl = existingWaypointsByControlPoint.get(waypoint.getControlPoint());
-                if (wpl == null) {
-                    wpl = new ArrayList<Waypoint>();
-                    existingWaypointsByControlPoint.put(waypoint.getControlPoint(), wpl);
+        Patch<Waypoint> patch = null;
+        synchronized (updateMonitor) {
+            lockForRead();
+            try {
+                Iterable<Waypoint> courseWaypoints = getWaypoints();
+                List<Waypoint> newWaypointList = new LinkedList<Waypoint>();
+                // key existing waypoints by control points and re-use each one at most once during construction of the
+                // new waypoint list; since several waypoints can have the same control point, the map goes from
+                // control point to List<Waypoint>. The waypoints in the lists are held in the order of their
+                // occurrence in courseToUpdate.getWaypoints().
+                Map<com.sap.sailing.domain.base.ControlPoint, List<Waypoint>> existingWaypointsByControlPoint = new HashMap<com.sap.sailing.domain.base.ControlPoint, List<Waypoint>>();
+                for (Waypoint waypoint : courseWaypoints) {
+                    List<Waypoint> wpl = existingWaypointsByControlPoint.get(waypoint.getControlPoint());
+                    if (wpl == null) {
+                        wpl = new ArrayList<Waypoint>();
+                        existingWaypointsByControlPoint.put(waypoint.getControlPoint(), wpl);
+                    }
+                    wpl.add(waypoint);
                 }
-                wpl.add(waypoint);
-            }
-            for (Pair<ControlPoint, NauticalSide> newDomainControlPoint : newControlPoints) {
-                List<Waypoint> waypoints = existingWaypointsByControlPoint.get(newDomainControlPoint.getA());
-                Waypoint waypoint;
-                if (waypoints == null || waypoints.isEmpty()) {
-                    // must be a new control point for which we don't have a waypoint yet
-                    waypoint = baseDomainFactory.createWaypoint(newDomainControlPoint.getA(), newDomainControlPoint.getB());
-                } else {
-                    waypoint = waypoints.remove(0); // take the first from the list
+                for (Pair<ControlPoint, NauticalSide> newDomainControlPoint : newControlPoints) {
+                    List<Waypoint> waypoints = existingWaypointsByControlPoint.get(newDomainControlPoint.getA());
+                    Waypoint waypoint;
+                    if (waypoints == null || waypoints.isEmpty()) {
+                        // must be a new control point for which we don't have a waypoint yet
+                        waypoint = baseDomainFactory.createWaypoint(newDomainControlPoint.getA(),
+                                newDomainControlPoint.getB());
+                    } else {
+                        waypoint = waypoints.remove(0); // take the first from the list
+                    }
+                    newWaypointList.add(waypoint);
                 }
-                newWaypointList.add(waypoint);
+                patch = DiffUtils.diff(courseWaypoints, newWaypointList);
+            } finally {
+                unlockAfterRead();
             }
-            Patch<Waypoint> patch = DiffUtils.diff(courseWaypoints, newWaypointList);
-            if (!patch.isEmpty()) {
-                logger.info("applying course update " + patch + " to course " + this);
-                CourseAsWaypointList courseAsWaypointList = new CourseAsWaypointList(this);
-                patch.applyToInPlace(courseAsWaypointList);
+            if (patch != null && !patch.isEmpty()) {
+                lockForWrite();
+                try {
+                    logger.info("applying course update " + patch + " to course " + this);
+                    CourseAsWaypointList courseAsWaypointList = new CourseAsWaypointList(this);
+                    patch.applyToInPlace(courseAsWaypointList);
+                } finally {
+                    unlockAfterWrite();
+                }
             }
-        } finally {
-            LockUtil.unlockAfterWrite(lock);
         }
     }
-    
 }
diff --git a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
index bcf436fa2db..ba0dc67f876 100755
--- a/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
+++ b/java/com.sap.sailing.gwt.ui/src/main/java/com/sap/sailing/gwt/ui/server/SailingServiceImpl.java
@@ -871,7 +871,7 @@ public class SailingServiceImpl extends ProxiedRemoteServiceServlet implements S
                 LegEntryDTO legEntry;
                 // We loop over a copy of the course's legs; during a course change, legs may become "stale," even with
                 // regard to the leg/trackedLeg structures inside the tracked race which is updated by the course change
-                // immediately. Make sure we're tolerant against disappearing legs! See bug 794.
+                // immediately. That's why we've acquired a read lock for the course above.
                 TrackedLegOfCompetitor trackedLeg = trackedRace.getTrackedLeg(competitor, leg);
                 if (trackedLeg != null && trackedLeg.hasStartedLeg(timePoint)) {
                     legEntry = createLegEntry(trackedLeg, timePoint, waitForLatestAnalyses, legRanksCache);
diff --git a/java/com.sap.sailing.server.gateway.serialization/src/com/sap/sailing/server/gateway/serialization/racegroup/impl/RaceCellJsonSerializer.java b/java/com.sap.sailing.server.gateway.serialization/src/com/sap/sailing/server/gateway/serialization/racegroup/impl/RaceCellJsonSerializer.java
index 637908b0859..e94b3367d67 100644
--- a/java/com.sap.sailing.server.gateway.serialization/src/com/sap/sailing/server/gateway/serialization/racegroup/impl/RaceCellJsonSerializer.java
+++ b/java/com.sap.sailing.server.gateway.serialization/src/com/sap/sailing/server/gateway/serialization/racegroup/impl/RaceCellJsonSerializer.java
@@ -1,9 +1,7 @@
 package com.sap.sailing.server.gateway.serialization.racegroup.impl;
 
-import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.racegroup.RaceCell;
 import com.sap.sailing.domain.racelog.RaceLog;
 import com.sap.sailing.server.gateway.serialization.JsonSerializer;
@@ -14,11 +12,9 @@ public class RaceCellJsonSerializer implements JsonSerializer<RaceCell> {
     public static final String FIELD_COMPETITORS = "competitors";
 
     private JsonSerializer<RaceLog> logSerializer;
-    private JsonSerializer<Competitor> competitorSerializer;
 
-    public RaceCellJsonSerializer(JsonSerializer<RaceLog> logSerializer, JsonSerializer<Competitor> competitorSerializer) {
+    public RaceCellJsonSerializer(JsonSerializer<RaceLog> logSerializer) {
         this.logSerializer = logSerializer;
-        this.competitorSerializer = competitorSerializer;
     }
 
     @Override
@@ -27,18 +23,8 @@ public class RaceCellJsonSerializer implements JsonSerializer<RaceCell> {
 
         result.put(FIELD_NAME, object.getName());
         result.put(FIELD_RACE_LOG, logSerializer.serialize(object.getRaceLog()));
-        JSONArray competitorArray = getJSONCompetitorArray(object);
-        result.put(FIELD_COMPETITORS, competitorArray);
 
         return result;
     }
 
-    private JSONArray getJSONCompetitorArray(RaceCell object) {
-        JSONArray competitorArray = new JSONArray();
-        for (Competitor competitor : object.getCompetitors()) {
-            competitorArray.add(competitorSerializer.serialize(competitor));
-        }
-        return competitorArray;
-    }
-
 }
diff --git a/java/com.sap.sailing.server.gateway/WEB-INF/web.xml b/java/com.sap.sailing.server.gateway/WEB-INF/web.xml
index 6b4ebc8b031..4430dca51d6 100644
--- a/java/com.sap.sailing.server.gateway/WEB-INF/web.xml
+++ b/java/com.sap.sailing.server.gateway/WEB-INF/web.xml
@@ -50,6 +50,15 @@
 		<url-pattern>/rc/currentcourse</url-pattern>
 	</servlet-mapping>
 	
+	<servlet>
+		<servlet-name>RCCompetitors</servlet-name>
+		<servlet-class>com.sap.sailing.server.gateway.impl.rc.CompetitorsJsonExportServlet</servlet-class>
+	</servlet>
+	<servlet-mapping>
+		<servlet-name>RCCompetitors</servlet-name>
+		<url-pattern>/rc/competitors</url-pattern>
+	</servlet-mapping>
+	
 	<!-- RACE COMMITTEE END -->
 
 	<servlet>
diff --git a/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/CompetitorsJsonExportServlet.java b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/CompetitorsJsonExportServlet.java
new file mode 100644
index 00000000000..e87693f5f1b
--- /dev/null
+++ b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/CompetitorsJsonExportServlet.java
@@ -0,0 +1,86 @@
+package com.sap.sailing.server.gateway.impl.rc;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.json.simple.JSONArray;
+
+import com.sap.sailing.domain.base.Competitor;
+import com.sap.sailing.domain.base.Fleet;
+import com.sap.sailing.domain.base.RaceColumn;
+import com.sap.sailing.domain.leaderboard.Leaderboard;
+import com.sap.sailing.domain.tracking.TrackedRace;
+import com.sap.sailing.server.RacingEventService;
+import com.sap.sailing.server.gateway.AbstractJsonHttpServlet;
+import com.sap.sailing.server.gateway.serialization.racegroup.impl.CompetitorJsonSerializer;
+
+public class CompetitorsJsonExportServlet extends AbstractJsonHttpServlet {
+    private static final long serialVersionUID = 4510175441769759252L;
+
+    public static final String PARAMS_LEADERBOARD_NAME = "leaderboard";
+    public static final String PARAMS_RACE_COLUMN_NAME = "raceColumn";
+    public static final String PARAMS_RACE_FLEET_NAME = "fleet";
+
+    @Override
+    protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
+
+        String leaderboardName = request.getParameter(PARAMS_LEADERBOARD_NAME);
+        if (leaderboardName == null) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST,
+                    String.format("Missing parameter '%s'.", PARAMS_LEADERBOARD_NAME));
+            return;
+        }
+
+        String raceColumnName = request.getParameter(PARAMS_RACE_COLUMN_NAME);
+        if (raceColumnName == null) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST,
+                    String.format("Missing parameter '%s'.", PARAMS_RACE_COLUMN_NAME));
+            return;
+        }
+        
+        String fleetName = request.getParameter(PARAMS_RACE_FLEET_NAME);
+        if (fleetName == null) {
+            response.sendError(HttpServletResponse.SC_BAD_REQUEST,
+                    String.format("Missing parameter '%s'.", PARAMS_RACE_FLEET_NAME));
+            return;
+        }
+        
+        RacingEventService service = getService();
+
+        Leaderboard leaderboard = service.getLeaderboardByName(leaderboardName);
+        if (leaderboard == null) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, "No such leaderboard found.");
+            return;
+        }
+
+        RaceColumn raceColumn = leaderboard.getRaceColumnByName(raceColumnName);
+        if (raceColumn == null) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, "No such race column found.");
+            return;
+        }
+        
+        Fleet fleet = raceColumn.getFleetByName(fleetName);
+        if (fleet == null) {
+            response.sendError(HttpServletResponse.SC_NOT_FOUND, "No such fleet found.");
+            return;
+        }
+
+        TrackedRace trackedRace = raceColumn.getTrackedRace(fleet);
+       
+        JSONArray result = new JSONArray();
+        
+        if (trackedRace != null) {
+            CompetitorJsonSerializer serializer = new CompetitorJsonSerializer();
+
+            for (Competitor competitor : raceColumn.getRaceDefinition(fleet).getCompetitors()) {
+                result.add(serializer.serialize(competitor));
+            }
+        }
+        
+        result.writeJSONString(response.getWriter());
+        response.setContentType("application/json");
+    }
+}
diff --git a/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupFactory.java b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupFactory.java
index 11d71582fd9..6a42cf54a19 100644
--- a/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupFactory.java
+++ b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupFactory.java
@@ -8,7 +8,6 @@ import java.util.List;
 import java.util.Map;
 
 import com.sap.sailing.domain.base.BoatClass;
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.CourseArea;
 import com.sap.sailing.domain.base.Fleet;
 import com.sap.sailing.domain.base.RaceColumn;
@@ -24,7 +23,6 @@ import com.sap.sailing.domain.base.racegroup.impl.RaceGroupImpl;
 import com.sap.sailing.domain.base.racegroup.impl.RaceRowImpl;
 import com.sap.sailing.domain.base.racegroup.impl.SeriesWithRowsImpl;
 import com.sap.sailing.domain.common.LeaderboardNameConstants;
-import com.sap.sailing.domain.common.impl.Util;
 import com.sap.sailing.domain.leaderboard.Leaderboard;
 import com.sap.sailing.domain.leaderboard.RegattaLeaderboard;
 
@@ -79,11 +77,7 @@ public class RaceGroupFactory {
         Collection<RaceCell> cells = new ArrayList<>();
         for (RaceColumn raceColumn : raceColumns) {
             Fleet fleet = raceColumn.getFleetByName(fleetName);
-            Collection<Competitor> competitors = new ArrayList<Competitor>();
-            if (raceColumn.getRaceDefinition(fleet) != null) {
-                Util.addAll(raceColumn.getRaceDefinition(fleet).getCompetitors(), competitors);
-            }
-            cells.add(new RaceCellImpl(raceColumn.getName(), raceColumn.getRaceLog(fleet), competitors));
+            cells.add(new RaceCellImpl(raceColumn.getName(), raceColumn.getRaceLog(fleet)));
         }
         return cells;
     }
diff --git a/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupJsonExportServlet.java b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupJsonExportServlet.java
index aaa618ef3a3..394ec968e64 100644
--- a/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupJsonExportServlet.java
+++ b/java/com.sap.sailing.server.gateway/src/com/sap/sailing/server/gateway/impl/rc/RaceGroupJsonExportServlet.java
@@ -81,7 +81,7 @@ public class RaceGroupJsonExportServlet extends AbstractJsonHttpServlet {
         return new RaceGroupJsonSerializer(new BoatClassJsonSerializer(), new CourseAreaJsonSerializer(),
                 new SeriesWithRowsOfRaceGroupSerializer(new SeriesWithRowsJsonSerializer(
                         new RaceRowsOfSeriesWithRowsSerializer(new RaceRowJsonSerializer(new FleetJsonSerializer(
-                                new ColorJsonSerializer()), new RaceCellJsonSerializer(createRaceLogSerializer(), new CompetitorJsonSerializer()))))));
+                                new ColorJsonSerializer()), new RaceCellJsonSerializer(createRaceLogSerializer()))))));
 
     }
 
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OfflineDataManager.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OfflineDataManager.java
index c51ed554245..1bf59279267 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OfflineDataManager.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OfflineDataManager.java
@@ -89,7 +89,7 @@ public class OfflineDataManager extends DataManager {
                         new FleetImpl("Default"), 
                         qualifying, 
                         raceGroup), 
-                        log, competitors);
+                        log);
 
         log = new PassAwareRaceLogImpl();
         /*log.add(factory.createStartTimeEvent(
@@ -105,7 +105,7 @@ public class OfflineDataManager extends DataManager {
                         new FleetImpl("Default"), 
                         qualifying, 
                         raceGroup), 
-                        log, competitors);
+                        log);
 
         log = new PassAwareRaceLogImpl();
         /*log.add(factory.createRaceStatusEvent(
@@ -118,7 +118,7 @@ public class OfflineDataManager extends DataManager {
                         new FleetImpl("Default"), 
                         qualifying, 
                         raceGroup), 
-                        log, competitors);
+                        log);
         /*ManagedRace m1 = new ManagedRaceImpl(
 				new ManagedRaceIdentifierImpl(
 						"M1", 
@@ -164,4 +164,9 @@ public class OfflineDataManager extends DataManager {
         client.onLoadSucceded(managedRace.getCourseOnServer());
     }
 
+    @Override
+    public void loadCompetitors(ManagedRace managedRace, LoadClient<Collection<Competitor>> client) {
+        client.onLoadSucceded((Collection<Competitor>) managedRace.getCompetitors());
+    }
+
 }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OnlineDataManager.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OnlineDataManager.java
index efe1c9adfd8..98b5fc557d5 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OnlineDataManager.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/OnlineDataManager.java
@@ -10,6 +10,7 @@ import java.util.Collection;
 import android.content.Context;
 
 import com.sap.sailing.domain.base.BoatClass;
+import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.CourseArea;
 import com.sap.sailing.domain.base.CourseBase;
 import com.sap.sailing.domain.base.EventBase;
@@ -17,12 +18,14 @@ import com.sap.sailing.domain.base.Mark;
 import com.sap.sailing.domain.base.SharedDomainFactory;
 import com.sap.sailing.racecommittee.app.AppConstants;
 import com.sap.sailing.racecommittee.app.data.clients.LoadClient;
+import com.sap.sailing.racecommittee.app.data.handlers.CompetitorsDataHandler;
 import com.sap.sailing.racecommittee.app.data.handlers.CourseDataHandler;
 import com.sap.sailing.racecommittee.app.data.handlers.DataHandler;
 import com.sap.sailing.racecommittee.app.data.handlers.EventsDataHandler;
 import com.sap.sailing.racecommittee.app.data.handlers.ManagedRacesDataHandler;
 import com.sap.sailing.racecommittee.app.data.handlers.MarksDataHandler;
 import com.sap.sailing.racecommittee.app.data.loaders.DataLoader;
+import com.sap.sailing.racecommittee.app.data.parsers.CompetitorsDataParser;
 import com.sap.sailing.racecommittee.app.data.parsers.CourseDataParser;
 import com.sap.sailing.racecommittee.app.data.parsers.DataParser;
 import com.sap.sailing.racecommittee.app.data.parsers.EventsDataParser;
@@ -142,7 +145,7 @@ public class OnlineDataManager extends DataManager {
         DataParser<Collection<ManagedRace>> parser = new ManagedRacesDataParser(new RaceGroupDeserializer(
                 boatClassDeserializer, new SeriesWithRowsDeserializer(new RaceRowDeserializer(new FleetDeserializer(
                         new ColorDeserializer()), new RaceCellDeserializer(
-                                new RaceLogDeserializer(RaceLogEventDeserializer.create(domainFactory)), new CompetitorDeserializer(domainFactory))))));
+                                new RaceLogDeserializer(RaceLogEventDeserializer.create(domainFactory)))))));
         DataHandler<Collection<ManagedRace>> handler = new ManagedRacesDataHandler(this, client);
 
         try {
@@ -215,4 +218,29 @@ public class OnlineDataManager extends DataManager {
             e.printStackTrace();
         }
     }
+
+    @Override
+    public void loadCompetitors(ManagedRace managedRace, LoadClient<Collection<Competitor>> client) {
+        SharedDomainFactory domainFactory = DomainFactoryImpl.INSTANCE;
+        JsonDeserializer<Competitor> competitorDeserializer = new CompetitorDeserializer(domainFactory);
+        DataParser<Collection<Competitor>> parser = new CompetitorsDataParser(competitorDeserializer);
+        DataHandler<Collection<Competitor>> handler = new CompetitorsDataHandler(this, client, managedRace);
+        
+        ManagedRaceIdentifier identifier = managedRace.getIdentifier();
+        
+        String raceGroupName = URLEncoder.encode(identifier.getRaceGroup().getName());
+        String raceColumnName = URLEncoder.encode(identifier.getRaceName());
+        String fleetName = URLEncoder.encode(identifier.getFleet().getName());
+        
+        try {
+            new DataLoader<Collection<Competitor>>(context, URI.create(AppConstants.getServerBaseURL(context)
+                    + "/sailingserver/rc/competitors?leaderboard=" + raceGroupName + "&raceColumn=" + raceColumnName 
+                    + "&fleet=" + fleetName), parser, handler)
+                    .forceLoad();
+        } catch (MalformedURLException e) {
+            e.printStackTrace();
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
 }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/ReadonlyDataManager.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/ReadonlyDataManager.java
index 79c64213f49..903837f9940 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/ReadonlyDataManager.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/ReadonlyDataManager.java
@@ -3,6 +3,7 @@ package com.sap.sailing.racecommittee.app.data;
 import java.io.Serializable;
 import java.util.Collection;
 
+import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.CourseArea;
 import com.sap.sailing.domain.base.CourseBase;
 import com.sap.sailing.domain.base.EventBase;
@@ -23,4 +24,6 @@ public interface ReadonlyDataManager {
     public void loadMarks(ManagedRace managedRace, LoadClient<Collection<Mark>> client);
     
     public void loadCourse(ManagedRace managedRace, LoadClient<CourseBase> client);
+    
+    public void loadCompetitors(ManagedRace managedRace, LoadClient<Collection<Competitor>> client);
 }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/handlers/CompetitorsDataHandler.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/handlers/CompetitorsDataHandler.java
new file mode 100644
index 00000000000..03cd7d7d7bf
--- /dev/null
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/handlers/CompetitorsDataHandler.java
@@ -0,0 +1,25 @@
+package com.sap.sailing.racecommittee.app.data.handlers;
+
+import java.util.Collection;
+
+import com.sap.sailing.domain.base.Competitor;
+import com.sap.sailing.racecommittee.app.data.OnlineDataManager;
+import com.sap.sailing.racecommittee.app.data.clients.LoadClient;
+import com.sap.sailing.racecommittee.app.domain.ManagedRace;
+
+public class CompetitorsDataHandler extends DataHandler<Collection<Competitor>> {
+    
+    private ManagedRace race;
+
+    public CompetitorsDataHandler(OnlineDataManager manager, LoadClient<Collection<Competitor>> client, ManagedRace managedRace) {
+        super(manager, client);
+        race = managedRace;
+    }
+
+    @Override
+    public void onLoaded(Collection<Competitor> data) {
+        super.onLoaded(data);
+        race.setCompetitors(data);
+    }
+
+}
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/CompetitorsDataParser.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/CompetitorsDataParser.java
new file mode 100644
index 00000000000..385de805049
--- /dev/null
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/CompetitorsDataParser.java
@@ -0,0 +1,37 @@
+package com.sap.sailing.racecommittee.app.data.parsers;
+
+import java.io.Reader;
+import java.util.ArrayList;
+import java.util.Collection;
+
+import org.json.simple.JSONArray;
+import org.json.simple.JSONObject;
+import org.json.simple.JSONValue;
+
+import com.sap.sailing.domain.base.Competitor;
+import com.sap.sailing.server.gateway.deserialization.JsonDeserializer;
+import com.sap.sailing.server.gateway.deserialization.impl.Helpers;
+
+public class CompetitorsDataParser implements DataParser<Collection<Competitor>> {
+
+    private JsonDeserializer<Competitor> deserializer;
+
+    public CompetitorsDataParser(JsonDeserializer<Competitor> deserializer) {
+        this.deserializer = deserializer;
+    }
+
+    public Collection<Competitor> parse(Reader reader) throws Exception {
+        Object parsedResult = JSONValue.parseWithException(reader);
+        JSONArray jsonArray = Helpers.toJSONArraySafe(parsedResult);
+        Collection<Competitor> competitors = new ArrayList<Competitor>();
+
+        for (Object element : jsonArray) {
+            JSONObject json = Helpers.toJSONObjectSafe(element);
+            Competitor competitor = deserializer.deserialize(json);
+            competitors.add(competitor);
+        }
+
+        return competitors;
+    }
+
+}
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/ManagedRacesDataParser.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/ManagedRacesDataParser.java
index 03287295282..e5346daae9a 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/ManagedRacesDataParser.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/data/parsers/ManagedRacesDataParser.java
@@ -8,7 +8,6 @@ import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 import org.json.simple.JSONValue;
 
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.Fleet;
 import com.sap.sailing.domain.base.racegroup.RaceCell;
 import com.sap.sailing.domain.base.racegroup.RaceGroup;
@@ -60,8 +59,7 @@ public class ManagedRacesDataParser implements DataParser<Collection<ManagedRace
 							series, 
 							fleet, 
 							cell.getName(), 
-							log,
-							cell.getCompetitors());
+							log);
 					target.add(race);
 				}
 			}
@@ -69,11 +67,11 @@ public class ManagedRacesDataParser implements DataParser<Collection<ManagedRace
 	}
 
 	private ManagedRace createManagedRace(RaceGroup raceGroup, SeriesWithRows series,
-			Fleet fleet, String name, PassAwareRaceLog raceLog, Iterable<Competitor> competitors) {
+			Fleet fleet, String name, PassAwareRaceLog raceLog) {
 		return new ManagedRaceImpl(
 				new ManagedRaceIdentifierImpl(name, 
 						new FleetIdentifierImpl(fleet, series, raceGroup)),
-				raceLog, competitors);
+				raceLog);
 		
 	}
 
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/deserialization/impl/RaceCellDeserializer.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/deserialization/impl/RaceCellDeserializer.java
index f30a9f03498..e6e9d73c3e5 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/deserialization/impl/RaceCellDeserializer.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/deserialization/impl/RaceCellDeserializer.java
@@ -1,12 +1,7 @@
 package com.sap.sailing.racecommittee.app.deserialization.impl;
 
-import java.util.ArrayList;
-import java.util.List;
-
-import org.json.simple.JSONArray;
 import org.json.simple.JSONObject;
 
-import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.racegroup.RaceCell;
 import com.sap.sailing.domain.base.racegroup.impl.RaceCellImpl;
 import com.sap.sailing.domain.racelog.RaceLog;
@@ -18,11 +13,9 @@ import com.sap.sailing.server.gateway.serialization.racegroup.impl.RaceCellJsonS
 public class RaceCellDeserializer implements JsonDeserializer<RaceCell> {
 
     private JsonDeserializer<RaceLog> logDeserializer;
-    private JsonDeserializer<Competitor> competitorDeserializer;
 
-    public RaceCellDeserializer(JsonDeserializer<RaceLog> logDeserializer, JsonDeserializer<Competitor> competitorDeserializer) {
+    public RaceCellDeserializer(JsonDeserializer<RaceLog> logDeserializer) {
         this.logDeserializer = logDeserializer;
-        this.competitorDeserializer = competitorDeserializer;
     }
 
     public RaceCell deserialize(JSONObject object)
@@ -32,20 +25,8 @@ public class RaceCellDeserializer implements JsonDeserializer<RaceCell> {
         JSONObject logJson = Helpers.getNestedObjectSafe(object, RaceCellJsonSerializer.FIELD_RACE_LOG);
         RaceLog log = logDeserializer.deserialize(logJson);
 
-        List<Competitor> competitors = deserializeCompetitorList(object);
 
-        return new RaceCellImpl(name, log, competitors);
-    }
-
-    private List<Competitor> deserializeCompetitorList(JSONObject object) throws JsonDeserializationException {
-        List<Competitor> competitors = new ArrayList<Competitor>();
-        JSONArray competitorsJson = Helpers.getNestedArraySafe(object, RaceCellJsonSerializer.FIELD_COMPETITORS);
-        for (Object competitorObject : competitorsJson) {
-            JSONObject jsonObject = (JSONObject) competitorObject;
-            Competitor competitor = competitorDeserializer.deserialize(jsonObject);
-            competitors.add(competitor);
-        }
-        return competitors;
+        return new RaceCellImpl(name, log);
     }
 
 }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/ManagedRace.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/ManagedRace.java
index 25141b8dd62..1b6175d403a 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/ManagedRace.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/ManagedRace.java
@@ -1,5 +1,7 @@
 package com.sap.sailing.racecommittee.app.domain;
 
+import java.util.Collection;
+
 import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.CourseBase;
 import com.sap.sailing.domain.common.Named;
@@ -44,10 +46,16 @@ public interface ManagedRace extends ManagedRaceIdentifier, Named, WithID {
          * returns the list of competitors for this race
          * @return list of competitors
          */
-        public Iterable<Competitor> getCompetitors();
+        public Collection<Competitor> getCompetitors();
         
         public CourseBase getCourseOnServer();
         
         public void setCourseOnServer(CourseBase course);
+        
+        /**
+         * sets the list of competitors for a race. As the competitors are retrieved later from the backend, the list of competitors has to be settable.
+         * @param competitors the retrieved list of competitors for this race
+         */
+        public void setCompetitors(Collection<Competitor> competitors);
 
 }
\ No newline at end of file
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/impl/ManagedRaceImpl.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/impl/ManagedRaceImpl.java
index 1d9698d7876..1f262d8db9d 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/impl/ManagedRaceImpl.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/domain/impl/ManagedRaceImpl.java
@@ -1,6 +1,8 @@
 package com.sap.sailing.racecommittee.app.domain.impl;
 
 import java.io.Serializable;
+import java.util.ArrayList;
+import java.util.Collection;
 
 import com.sap.sailing.domain.base.Competitor;
 import com.sap.sailing.domain.base.CourseBase;
@@ -23,20 +25,20 @@ public class ManagedRaceImpl implements ManagedRace {
 
     private ManagedRaceIdentifier identifier;	
     private RaceState state;
-    private Iterable<Competitor> competitors;
+    private Collection<Competitor> competitors;
     private CourseBase courseOnServer;
 
-    public ManagedRaceImpl(ManagedRaceIdentifier identifier, PassAwareRaceLog raceLog, Iterable<Competitor> competitors) {
+    public ManagedRaceImpl(ManagedRaceIdentifier identifier, PassAwareRaceLog raceLog) {
         //TODO To be changed when the start procedure for a regatta/leaderboard can be selected in the GWT Admin Console on backend side
-        this(identifier, new RaceStateImpl(raceLog, new GateStartProcedure(raceLog)), competitors);
+        this(identifier, new RaceStateImpl(raceLog, new GateStartProcedure(raceLog)));
     }
 
     public ManagedRaceImpl(
             ManagedRaceIdentifier identifier,
-            RaceState state, Iterable<Competitor> competitors) {
+            RaceState state) {
         this.identifier = identifier;
         this.state = state;
-        this.competitors = competitors;
+        this.competitors = new ArrayList<Competitor>();
         this.courseOnServer = null;
     }
 
@@ -86,7 +88,7 @@ public class ManagedRaceImpl implements ManagedRace {
     }
     
     @Override
-    public Iterable<Competitor> getCompetitors() {
+    public Collection<Competitor> getCompetitors() {
         return competitors;
     }
 
@@ -100,4 +102,9 @@ public class ManagedRaceImpl implements ManagedRace {
         courseOnServer = course;
     }
 
+    @Override
+    public void setCompetitors(Collection<Competitor> competitors) {
+        this.competitors = competitors;
+    }
+
 }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/FinishingRaceFragment.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/FinishingRaceFragment.java
index 48343d00ea7..583daf49574 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/FinishingRaceFragment.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/FinishingRaceFragment.java
@@ -1,6 +1,7 @@
 package com.sap.sailing.racecommittee.app.ui.fragments.raceinfo;
 
 import java.util.Date;
+
 import android.app.AlertDialog;
 import android.app.FragmentManager;
 import android.content.DialogInterface;
@@ -64,7 +65,7 @@ public class FinishingRaceFragment extends RaceFragment {
         });
         
     }
-    
+
     protected void setCountdownLabels(long millisecondsSinceStart) {
         setStarttimeCountupLabel(millisecondsSinceStart);
     }
diff --git a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/PositioningFragment.java b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/PositioningFragment.java
index ede7a678876..d74083db514 100644
--- a/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/PositioningFragment.java
+++ b/mobile/com.sap.sailing.racecommittee.app/src/com/sap/sailing/racecommittee/app/ui/fragments/raceinfo/PositioningFragment.java
@@ -2,6 +2,7 @@ package com.sap.sailing.racecommittee.app.ui.fragments.raceinfo;
 
 import java.io.Serializable;
 import java.util.ArrayList;
+import java.util.Collection;
 import java.util.Collections;
 import java.util.Comparator;
 import java.util.List;
@@ -27,6 +28,8 @@ import com.sap.sailing.domain.common.Named;
 import com.sap.sailing.domain.common.impl.Util;
 import com.sap.sailing.domain.common.impl.Util.Triple;
 import com.sap.sailing.racecommittee.app.R;
+import com.sap.sailing.racecommittee.app.data.OnlineDataManager;
+import com.sap.sailing.racecommittee.app.data.clients.LoadClient;
 import com.sap.sailing.racecommittee.app.domain.impl.DomainFactoryImpl;
 import com.sap.sailing.racecommittee.app.logging.ExLog;
 import com.sap.sailing.racecommittee.app.ui.adapters.finishing.CompetitorPositioningListAdapter;
@@ -87,6 +90,7 @@ public class PositioningFragment extends RaceDialogFragment {
         Collections.sort(competitors, competitorComparator);
         competitorsAdapter = new CompetitorsAdapter(getActivity(), R.layout.welter_grid_competitor_cell, competitors);
         
+        loadCompetitors();
         
         positionedCompetitors = initializeFinishPositioningList();
         deletePositionedCompetitorsFromUnpositionedList();
@@ -142,6 +146,12 @@ public class PositioningFragment extends RaceDialogFragment {
         });
     }
     
+    @Override
+    public void onResume() {
+        super.onResume();
+        onLoadCompetitorsSucceeded(getRace().getCompetitors());
+    }
+    
     /**
      * Creates a DragSortController and thereby defines the behaviour of the drag sort list
      */
@@ -156,7 +166,32 @@ public class PositioningFragment extends RaceDialogFragment {
         controller.setBackgroundColor(getActivity().getResources().getColor(R.color.welter_medium_blue));
         return controller;
     }
-    
+
+    private void loadCompetitors() {
+
+        OnlineDataManager.create(getActivity()).loadCompetitors(getRace(), new LoadClient<Collection<Competitor>>() {
+
+            @Override
+            public void onLoadFailed(Exception reason) {
+                onLoadCompetitorsSucceeded(getRace().getCompetitors());
+            }
+
+            @Override
+            public void onLoadSucceded(Collection<Competitor> data) {
+                onLoadCompetitorsSucceeded(data);
+            }
+
+        });
+    }
+
+    protected void onLoadCompetitorsSucceeded(Collection<Competitor> data) {
+        competitors.clear();
+        competitors.addAll(data);
+        Collections.sort(competitors, competitorComparator);
+        deletePositionedCompetitorsFromUnpositionedList();
+        competitorsAdapter.notifyDataSetChanged();
+    }
+
     private void deletePositionedCompetitorsFromUnpositionedList() {
         for (Triple<Serializable, String, MaxPointsReason> positionedItem : positionedCompetitors) {
             Competitor competitor = DomainFactoryImpl.INSTANCE.getExistingCompetitorById(positionedItem.getA());