Stall management system(SMYD) is calculating Vmvr(the yellow band) based on FMC grossweight, ALTITUDE ,computed airspeed fed by the ADiRUs and many other factors such as AoA,use of TAI....
They provide safe margins to maneuver,1.3 G for JAA,1.2 G for the FAA.
As altitude increase,the Mach nr will be the reference as the TAS of IAS and Mnr become equal.(cross over altitude).
The black and red top and low stripes are max or min safe design operating speeds based on weight,flaps,gear....NOT altitude.
Concerning the picture,the pilot in question is asking for trouble..and having the AT un the ARM mode is another sign of ....
Last edited by de facto; 26th Mar 2013 at 15:33.