diff --git a/ArduCopter/navigation.pde b/ArduCopter/navigation.pde
index 8cfddc4e83..d31a65669a 100644
--- a/ArduCopter/navigation.pde
+++ b/ArduCopter/navigation.pde
@@ -50,11 +50,12 @@ static void calc_XY_velocity(){
 	last_longitude 	= g_gps->longitude;
 	last_latitude 	= g_gps->latitude;
 
-	if(g_gps->ground_speed > 150){
+	/*if(g_gps->ground_speed > 150){
 		float temp = radians((float)g_gps->ground_course/100.0);
 		x_actual_speed = (float)g_gps->ground_speed * sin(temp);
 		y_actual_speed = (float)g_gps->ground_speed * cos(temp);
-	}
+	}*/
+
 
 	#if INERTIAL_NAV == ENABLED
 	// inertial_nav