Thanks for the 10/10 but i'd rather a gold star!
Sorry I didnt mean to sound dumb!! Just I've not heard of that before being from the UK we dont have the same requierments... or if we do I've not been told of it before as its just taken for granted that they are on all planes and its not something we have to know about. Its certainly not in our SEP manuals, but thankyou for your marking Im sure it will come in handy with my recurrent!