A320 tropopause, auto callout 50,40,30,20,10....
Hello, can you explane me why is important to set tropopause value in mcdu during preparation for flight and what is basic thing aboug that and aerodynamic and safety and performance?
My second question: why we have auto call out 50 40 30 20...what is main reason for that? 20 ok 10 ok but why 50,40,30... is that some reminder for something...some trigger ?
Thank you