<launch> <include file="$(find px4)/launch/posix_sitl.launch"> <arg name="world" value="/home/jake/catkin_ws/src/sitl_gazebo/worlds/obstacle.world"/> </include> <include file="$(find mavros)/launch/px4.launch"> <arg name="fcu_url" value="udp://:14550@127.0.0.1:14557"/> </include> <include file="$(find pilot_v2)/src/launch/offb.launch"> </include> </launch>