code: def hdg60(msg):
      
      d = hex2bin(data(msg))
  
      if d[0] == '0':
          return None
  
      sign = int(d[1])    # 1 -> west
      value = bin2int(d[2:12])
  
      if sign:
          value = value - 1024
  
      hdg = value * 90 / 512.0  # degree
  
      # convert from [-180, 180] to [0, 360]
      if hdg < 0:
          hdg = 360 + hdg
  
      return round(hdg, 3)
docs: Megnetic heading of aircraft
  
      Args:
          msg (String): 28 bytes hexadecimal message (BDS60) string
  
      Returns:
          float: heading in degrees to megnetic north (from 0 to 360)