I am about to be posted to a RAF unit and am a SSgt. I have been forewarned that all the Flight Sergeants (of the RAF) think that they hold the same rank as WO2. I know that FS do not hold the Royal Warrant. Can anyone clear this up. I am not looking for an individual opinion, rather some direction about where I can find the documentation that says SSgt and FS are the same. Perhaps someone with NATO experience can shed some light on this in light of the fact that they will know what the NATO OR rank numbers mean.