Thanks a lot but...
Thank you all...
Actually, what I really wanted to know was what happens to the senior senior F/O's when they are upgraded as commanders?
Let's say they've been in the company for 10 years and a DEC comes in just a month earlier than the senior F/O's upgrade. The DEC comes from a much smaller company where he could and actually did upgrade in a much shorter notice of time. As a result, a DEC might have less aviation experience and definitely has less company experience.
Now, how shall the seniority list be like?
Thanks again...