diff --git a/doc/examples/config.json b/doc/examples/config.json
index ea35046c..aacdcb6a 100644
--- a/doc/examples/config.json
+++ b/doc/examples/config.json
@@ -1,6 +1,6 @@
 {
   "race-name": "AC35",
-  "time-scale": 1.0,
+  "time-scale": 2.0,
   "race-size": 6,
   "teams": [
     {
diff --git a/doc/user_manual.md b/doc/user_manual.md
index 7c571c01..0ca79deb 100644
--- a/doc/user_manual.md
+++ b/doc/user_manual.md
@@ -1 +1,15 @@
-# User Manual
\ No newline at end of file
+# User Manual
+
+## Running the application
+
+When you execute the application, it will try to load a configuration file called config.json located in doc/examples/.
+
+You can specify a config file using the using the -f flag, for example 'java -jar app.jar -f doc/examples/config1.json'
+
+## The config file
+
+The teams/boats are specified in the config file under 'teams', each team requires a team name, and a velocity (in meters per second).
+
+The 'time-scale' option lets you change how long the race takes to complete. A time-scale of 1.0 is normal speed, 2.0 is 2x etc.
+
+The 'race-size' option lets you specify how many boats will be selected to compete in each race. There must be at least this many teams defined.
\ No newline at end of file