diff --git a/main.tex b/main.tex
index d2df9fd..da4fcc8 100644
--- a/main.tex
+++ b/main.tex
@@ -10,7 +10,7 @@
 
 
 \title{World Robotic Sailing Championship 2019 \\
-Notice of race and competition rules \\v1.0}
+Notice of race and competition rules \\v1.1}
 \date{\today}
 
 \begin{document}
@@ -295,7 +295,7 @@ \subsection{Station keeping and avoidance}
 After finishing the part 1, the boat could continue to take second part of the challenge.
 This part of challenge uses a single physical buoy at the centre (see Figure~\ref{fig:stationkeeping_requirement} part 2). 
 The GPS coordinate of the physical buoy will be given prior to the start. 
-After entering a circle with radius $R=20m$ around the way point, the 
+After entering a circle with radius $R=15m$ around the way point, the 
 sailing vessel aims to stay as close as possible without touch the buoy for 5 minutes.