Primary Flight Display of a Boeing 747-400 aircraft.
The electronic instrument shows airspeed, altitude, heading and additional data one a single display.
<a href="//commons.wikimedia.org/w/index.php?title=User:Ps1flyer&amp;action=edit&amp;redlink=1" class="new" title="User:Ps1flyer (page does not exist)">Markus Vitzethum</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>