To be fair I think Bismark was talking about conversion to type or as the light blue call it a "re-role". The latter simply takes far too long for crews already trained in role albeit on a different aircraft type (which makes the term re-role sound wrong anyway)?
Ab initios would obviously need a longer course than someone who has already conducted an OCF on SH already.
The Merlin present at the 848 wings parade looked like it fitted ok in the hangar! Certainly well enough not to turn off the move in the next SDSR
