"when you post using a title with the term ATCO most respondents on here would initially assume that you are, in fact, an ATCO. However the content & manner of your posts reveals that you couldn't possibly be. i.e. Dash 8 not RVSM approved." ---- Your right in saying I am not an ATCO...as I have previously posted, I also posted that I wasn't aware you guys had usernames which signify your position, which is fair enough. However...you used the example about that Dash 8 as if I was wrong in what I was saying, so I'm sorry in advance for being a pain...but can I clarify the situation. Wether the Dash 8 was RVSM approved or not doesn't matter because it can't fly at such an altitude that it would ever need to be? Am I right? Reason I'm checking is because your post is addressed to someone who would understand all the abreviations and Acronyms. I'm not quite there yet! Thanks