diff --git a/racevisionGame/src/main/java/mock/model/MockRace.java b/racevisionGame/src/main/java/mock/model/MockRace.java
index 26c63e9b..43945a46 100644
--- a/racevisionGame/src/main/java/mock/model/MockRace.java
+++ b/racevisionGame/src/main/java/mock/model/MockRace.java
@@ -61,7 +61,7 @@ public class MockRace extends RaceState {
      */
     private Polars polars;
 
-    private ActiveObserverCommand activeObserverCommand;
+    private Map<Integer, ActiveObserverCommand> activeObserverCommands;
 
     private long racePreStartTime = Constants.RacePreStartTime;
 
@@ -87,7 +87,7 @@ public class MockRace extends RaceState {
         this.setRaceDataSource(raceDataSource);
         this.setRegattaDataSource(regattaDataSource);
 
-        this.activeObserverCommand = new ActiveObserverCommand();
+        this.activeObserverCommands = new HashMap<>();
         this.polars = polars;
         this.scaleFactor = timeScale;
 
@@ -132,6 +132,7 @@ public class MockRace extends RaceState {
         getRaceDataSource().getParticipants().add(sourceID);
 
         this.boats.add(mockBoat);
+        this.activeObserverCommands.put(boat.getSourceID(), new ActiveObserverCommand());
 
         getRaceDataSource().incrementSequenceNumber();
 
@@ -752,11 +753,11 @@ public class MockRace extends RaceState {
         super.setChanged();
     }
 
-    public void addVelocityCommand(ObserverCommand c) {
-        this.activeObserverCommand.changeVelocityCommand(this, c);
+    public void addVelocityCommand(ObserverCommand c, int boatId) {
+        this.activeObserverCommands.get(boatId).changeVelocityCommand(this, c);
     }
 
-    public void addAngularCommand(ObserverCommand c) {
-        this.activeObserverCommand.changeAngularCommand(this, c);
+    public void addAngularCommand(ObserverCommand c, int boatId) {
+        this.activeObserverCommands.get(boatId).changeAngularCommand(this, c);
     }
 }
diff --git a/racevisionGame/src/main/java/mock/model/commandFactory/CollisionCommand.java b/racevisionGame/src/main/java/mock/model/commandFactory/CollisionCommand.java
index 52ec2b34..901ac860 100644
--- a/racevisionGame/src/main/java/mock/model/commandFactory/CollisionCommand.java
+++ b/racevisionGame/src/main/java/mock/model/commandFactory/CollisionCommand.java
@@ -36,6 +36,7 @@ public class CollisionCommand extends ObserverCommand {
     @Override
     public void update(Observable o, Object arg) {
         if(GPSCoordinate.calculateDistanceMeters(boat.getPosition(), startingPosition) < distance) {
+            boat.setVelocityDefault(false);
             boat.setPosition(GPSCoordinate.calculateNewPosition(boat.getPosition(), 3, azimuth));
         } else {
             race.deleteObserver(this);
diff --git a/racevisionGame/src/main/java/mock/model/commandFactory/SailsCommand.java b/racevisionGame/src/main/java/mock/model/commandFactory/SailsCommand.java
index ac4877c4..826e697b 100644
--- a/racevisionGame/src/main/java/mock/model/commandFactory/SailsCommand.java
+++ b/racevisionGame/src/main/java/mock/model/commandFactory/SailsCommand.java
@@ -13,7 +13,7 @@ public class SailsCommand extends ObserverCommand {
 
     public SailsCommand(MockRace race, MockBoat boat, boolean sailsOut) {
         super(race, boat);
-        race.addVelocityCommand(this);
+        race.addVelocityCommand(this, boat.getSourceID());
         this.sailsOut = sailsOut;
     }
 
@@ -37,15 +37,18 @@ public class SailsCommand extends ObserverCommand {
     public void update(Observable o, Object arg) {
         double acceleration = 0.5;
 
-        if(sailsOut && boat.getCurrentSpeed() < goalVelocity) {
-            boat.setCurrentSpeed(Math.min(goalVelocity, boat.getCurrentSpeed() + acceleration));
-        } else if (!sailsOut && boat.getCurrentSpeed() > goalVelocity) {
-            // Apply deceleration to strictly 0 speed
-            boat.setCurrentSpeed(Math.max(0, boat.getCurrentSpeed() - acceleration));
-        } else {
-            // Release boat from SailsCommand control
-            if(sailsOut) boat.setVelocityDefault(true);
-            race.deleteObserver(this);
+        if (!boat.isColliding()) {
+            boat.setVelocityDefault(false);
+            if (sailsOut && boat.getCurrentSpeed() < goalVelocity) {
+                boat.setCurrentSpeed(Math.min(goalVelocity, boat.getCurrentSpeed() + acceleration));
+            } else if (!sailsOut && boat.getCurrentSpeed() > goalVelocity) {
+                // Apply deceleration to strictly 0 speed
+                boat.setCurrentSpeed(Math.max(0, boat.getCurrentSpeed() - acceleration));
+            } else {
+                // Release boat from SailsCommand control
+                if (sailsOut) boat.setVelocityDefault(true);
+                race.deleteObserver(this);
+            }
         }
     }
 }
diff --git a/racevisionGame/src/main/java/mock/model/commandFactory/TackGybeCommand.java b/racevisionGame/src/main/java/mock/model/commandFactory/TackGybeCommand.java
index e10ee74a..78142da2 100644
--- a/racevisionGame/src/main/java/mock/model/commandFactory/TackGybeCommand.java
+++ b/racevisionGame/src/main/java/mock/model/commandFactory/TackGybeCommand.java
@@ -22,7 +22,7 @@ public class TackGybeCommand extends ObserverCommand {
      */
     public TackGybeCommand(MockRace race, MockBoat boat) {
         super(race, boat);
-        race.addAngularCommand(this);
+        race.addAngularCommand(this, boat.getSourceID());
     }
 
     @Override
diff --git a/racevisionGame/src/main/java/mock/model/commandFactory/VMGCommand.java b/racevisionGame/src/main/java/mock/model/commandFactory/VMGCommand.java
index 812f833a..fa4e7d69 100644
--- a/racevisionGame/src/main/java/mock/model/commandFactory/VMGCommand.java
+++ b/racevisionGame/src/main/java/mock/model/commandFactory/VMGCommand.java
@@ -24,7 +24,7 @@ public class VMGCommand extends ObserverCommand {
      */
     public VMGCommand(MockRace race, MockBoat boat) {
         super(race, boat);
-        race.addAngularCommand(this);
+        race.addAngularCommand(this, boat.getSourceID());
     }
 
     @Override
diff --git a/racevisionGame/src/main/java/mock/model/commandFactory/WindCommand.java b/racevisionGame/src/main/java/mock/model/commandFactory/WindCommand.java
index 85eec091..af2e422b 100644
--- a/racevisionGame/src/main/java/mock/model/commandFactory/WindCommand.java
+++ b/racevisionGame/src/main/java/mock/model/commandFactory/WindCommand.java
@@ -20,7 +20,7 @@ public class WindCommand extends ObserverCommand {
      */
     public WindCommand(MockRace race, MockBoat boat, boolean upwind) {
         super(race, boat);
-        race.addAngularCommand(this);
+        race.addAngularCommand(this, boat.getSourceID());
         this.direction = upwind? -1 : 1;
     }