@type t() :: %APM.Message.MagCalProgress{
  attempt: MAVLink.Types.uint8_t(),
  cal_mask: MAVLink.Types.uint8_t(),
  cal_status: APM.Types.mag_cal_status(),
  compass_id: MAVLink.Types.uint8_t(),
  completion_mask: [MAVLink.Types.uint8_t()],
  completion_pct: MAVLink.Types.uint8_t(),
  direction_x: Float32,
  direction_y: Float32,
  direction_z: Float32
}