public static MissionItem AddNavMissionItem(this IVehicle vehicle, GeoPoint point)
{
var item = vehicle.AddMissionItem();
item.Location.OnNext(point);
item.Autocontinue.OnNext(true);
item.Command.OnNext(MavCmd.MavCmdNavWaypoint);
item.Current.OnNext(false);
item.Frame.OnNext(MavFrame.MavFrameGlobalInt);
item.MissionType.OnNext(MavMissionType.MavMissionTypeMission);
item.Param1.OnNext(0);
item.Param2.OnNext(0);
item.Param3.OnNext(0);
item.Param4.OnNext(0);
return(item);
}