@type t() :: %APM.Message.HilControls{
  aux1: Float32,
  aux2: Float32,
  aux3: Float32,
  aux4: Float32,
  mode: APM.Types.mav_mode(),
  nav_mode: MAVLink.Types.uint8_t(),
  pitch_elevator: Float32,
  roll_ailerons: Float32,
  throttle: Float32,
  time_usec: MAVLink.Types.uint64_t(),
  yaw_rudder: Float32
}