@type t() :: %APM.Message.FollowTarget{
  acc: [Float32],
  alt: Float32,
  attitude_q: [Float32],
  custom_state: MAVLink.Types.uint64_t(),
  est_capabilities: MAVLink.Types.uint8_t(),
  lat: MAVLink.Types.int32_t(),
  lon: MAVLink.Types.int32_t(),
  position_cov: [Float32],
  rates: [Float32],
  timestamp: MAVLink.Types.uint64_t(),
  vel: [Float32]
}