Thanks for the replies,
Yes oldebloke, you're right not only the da/mda but all alts need to be corrected. I was just curious wether other countries applied them as wel. I used to fly for a 121 carrier in the states for 4 years and never even heard of it, definitely not part of comp sop's. Called some old buddies that have moved to the US majors (well, most are furloughed lately) and they had never heard of it either. Hence my curiousity how other countries applied them.
Thanks
P.s. I guess in Canada they become somewhat more important with the cold temps :-)