reading back and understanding a clearance are the salient points here
Correct. Therefore reading back '24R' is required, if the ATCO has used '24R' in his clearance.
What an interesting phrase
'barrack room lawyer' is. Funnily enough, I'm quite interested in the etymology of words and phrases, so I looked this one up. It seems there are a few different meanings:
- A person who, although unqualified, insists on giving advice.
- A person that can get out of trouble by a thorough knowledge of the rules.
- A somewhat insubordinate nuisance, who usually has right on his side.
Perhaps you could clarify which particular meaning you were using in your post?
Knowing procedures and rules is an integral part of my job. But then you knew that. I'd imagine that it's an important part of your job too.