diff --git a/visualiser/src/main/java/seng302/Controllers/RaceController.java b/visualiser/src/main/java/seng302/Controllers/RaceController.java
index 61a2e6b0..143fbc7a 100644
--- a/visualiser/src/main/java/seng302/Controllers/RaceController.java
+++ b/visualiser/src/main/java/seng302/Controllers/RaceController.java
@@ -95,6 +95,13 @@ public class RaceController extends Controller {
         });
     }
 
+    /**
+     * Creates and sets initial display for Sparkline for race positions.
+     * A data series for each boat in the race is added.
+     * Position numbers are displayed.
+     *
+     * @param boats boats to display on the sparkline
+     */
     public void createSparkLine(ObservableList<Boat> boats){
         // NOTE: Y axis is in negatives to display correct positions
 
@@ -221,6 +228,12 @@ public class RaceController extends Controller {
         });
     }
 
+    /**
+     * Updates the sparkline to display current boat positions.
+     * New points are plotted to represent each boat when required.
+     *
+     * @param boatsInRace used for current boat positions.
+     */
     public void updateSparkline(ObservableList<Boat> boatsInRace){
         int placingVal = boatsInRace.size();
         sparkLineNumber++;