The Zero Reader was the ancestor of the flight direction panel before FMS (flight management system) and is still here with glass cockpits. It had a command function as opposed to the advisory function of the past. Attitude indicators as well as the equivalent of the compass card now have vertical and horizontal bars that advise you how to place the aeroplane to accomplish what ever input you had selected.
In other words flying a modern aeroplane is money for old rope but people don't know that because we wear big watches and Ray Bans.
Apparently one person who considered the Zero Reader essential was Nick the Greek. That is why Aunty Betty's Andovers were fitted with them.
Last edited by Fareastdriver; 24th Jun 2014 at 19:36.