<long_desc>0: the system will follow a zero order hold altitude setpoint 1: the system will follow a first order hold altitude setpoint values follow the definition in enum mission_altitude_mode</long_desc>
<short_desc>Maximal horizontal distance from home to first waypoint</short_desc>
<long_desc>Failsafe check to prevent running mission stored from previous flight at a new takeoff location. Set a value of zero or less to disable. The mission will not be started if the current waypoint is more distant than MIS_DIS_1WP from the home position.</long_desc>