Hi everyone

I would like to ask about topic title. what are the differences between these two modes? when do they occur? what do they mean? they always show up on the fma ( flight mode annunciator). in addition tell the same about vnav alt, please. I think these 3 modes are only in subject to vnav. when i get this described I will see everything clearly so this very important thing to me which is related to flying 737-800 ngx, without it I am flying but I don't understand what is happening.

 

Pleaseee help me, any answer will be appreciated

Search through the manuals PMDG thoughtfully provided. It's all there.

Start with the introduction manual than go thru the other manuals since you already paid for them. You mite learn some other interesting things while your searching for your answers