Originally Posted by
Murtoman
Id feel like the more relevant readout here is the V/S. Read the + or - properly and ALT blue starts to lose its necessity
That’s the issue: Some folks in a rush had used the VS and missread. I had one tired captain who select VS +2000 for a descent and read out loud VS -2000...It’s not that common but it does happen.. Luckily I was awake that day and noticed immediately. The missing ALT blue IMHO is a faster trigger to spot the mistake immediately.