@type t() :: %APM.Message.AdsbVehicle{
  altitude: MAVLink.Types.int32_t(),
  altitude_type: APM.Types.adsb_altitude_type(),
  callsign: [char()],
  emitter_type: APM.Types.adsb_emitter_type(),
  flags: MapSet.t(APM.Types.adsb_flags()),
  heading: MAVLink.Types.uint16_t(),
  hor_velocity: MAVLink.Types.uint16_t(),
  icao_address: MAVLink.Types.uint32_t(),
  lat: MAVLink.Types.int32_t(),
  lon: MAVLink.Types.int32_t(),
  squawk: MAVLink.Types.uint16_t(),
  tslc: MAVLink.Types.uint8_t(),
  ver_velocity: MAVLink.Types.int16_t()
}