diff --git a/src/main/java/seng302/gameServer/GameState.java b/src/main/java/seng302/gameServer/GameState.java
index 0b1debb4..20aaaf4f 100644
--- a/src/main/java/seng302/gameServer/GameState.java
+++ b/src/main/java/seng302/gameServer/GameState.java
@@ -66,6 +66,14 @@ public class GameState {
         GameState.currentStage = currentStage;
     }
 
+    public static Double getWindDirection() {
+        return windDirection;
+    }
+
+    public static Double getWindSpeed() {
+        return windSpeed;
+    }
+
     public static void updateBoat(Integer sourceId, BoatActionType actionType) {
         switch (actionType) {
             case VMG:
diff --git a/src/main/java/seng302/models/PolarTable.java b/src/main/java/seng302/models/PolarTable.java
index b40b54dd..83df7711 100644
--- a/src/main/java/seng302/models/PolarTable.java
+++ b/src/main/java/seng302/models/PolarTable.java
@@ -1,6 +1,9 @@
 package seng302.models;
 
-import java.io.*;
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
 import java.util.ArrayList;
 import java.util.HashMap;
 
@@ -140,7 +143,7 @@ public final class PolarTable {
     }
 
 
-    private static Double getClosestMatch(Double thisWindSpeed) {
+    public static Double getClosestMatch(Double thisWindSpeed) {
 
         ArrayList<Double> windValues = new ArrayList<>(polarTable.keySet());
 
diff --git a/src/main/java/seng302/models/Yacht.java b/src/main/java/seng302/models/Yacht.java
index c6c88944..7e45549d 100644
--- a/src/main/java/seng302/models/Yacht.java
+++ b/src/main/java/seng302/models/Yacht.java
@@ -2,12 +2,12 @@ package seng302.models;
 
 import static seng302.utilities.GeoUtility.getGeoCoordinate;
 
-import javafx.scene.paint.Color;
-import seng302.models.mark.Mark;
-import seng302.controllers.RaceViewController;
-
 import java.text.DateFormat;
 import java.text.SimpleDateFormat;
+import java.util.Map;
+import javafx.scene.paint.Color;
+import seng302.controllers.RaceViewController;
+import seng302.models.mark.Mark;
 import seng302.utilities.GeoPoint;
 
 /**
@@ -96,6 +96,32 @@ public class Yacht {
         location = getGeoCoordinate(location, heading, metersCovered);
     }
 
+    /**
+     * Adjusts the yachts velocity based on the wind direction and speed from the polar table.
+     *
+     * @param windDir current wind Direction TODO: 20/07/17 ajm412: (TWA or AWA, not 100% sure?)
+     * @param windSpd current wind Speed
+     */
+    public void updateYachtVelocity(Double windDir, Double windSpd) {
+        Double closestSpd = PolarTable.getClosestMatch(windSpd);
+        Map<Double, Double> polarsFromClosestSpd = PolarTable.getPolarTable().get(closestSpd);
+
+        Double closest = 0d;
+        Double closest_key = 0d;
+
+        for (Double key : polarsFromClosestSpd.keySet()) {
+            Double difference = Math.abs(key - windDir);
+            if (difference <= closest) {
+                closest = difference;
+                closest_key = key;
+            }
+        }
+//        System.out.println("Closest angle " + closest_key);
+//        System.out.println("WindDir " + windDir);
+        velocity = polarsFromClosestSpd.get(closest_key);
+    }
+
+
     public String getBoatType() {
         return boatType;
     }
diff --git a/src/test/java/seng302/models/YachtTest.java b/src/test/java/seng302/models/YachtTest.java
new file mode 100644
index 00000000..257e5f59
--- /dev/null
+++ b/src/test/java/seng302/models/YachtTest.java
@@ -0,0 +1,36 @@
+package seng302.models;
+
+
+import java.util.ArrayList;
+import java.util.List;
+import org.junit.Before;
+import org.junit.Test;
+import seng302.utilities.GeoPoint;
+
+public class YachtTest {
+
+    Double windDir;
+    Double windSpd;
+    List<Yacht> yachts = new ArrayList<Yacht>();
+
+    @Before
+    public void setUp() {
+        PolarTable.parsePolarFile(getClass().getResourceAsStream("/config/acc_polars.csv"));
+        windDir = 90d;
+        windSpd = 10d;
+
+        yachts.add(new Yacht("Yacht 1", "Y1", new GeoPoint(-30.0, 20.0), 160.0));
+        yachts.add(new Yacht("Yacht 2", "Y2", new GeoPoint(-40.0, -20.0), 100.0));
+        yachts.add(new Yacht("Yacht 3", "Y3", new GeoPoint(-35.0, -15.5), 20.0));
+    }
+
+    @Test
+    public void testVelocityUpdate() {
+        for (Yacht yacht : yachts) {
+            yacht.updateYachtVelocity(windDir, windSpd);
+            System.out.println(yacht.getVelocity());
+            // TODO: 20/07/17 ajm412: add assertions.
+        }
+    }
+
+}