Thanks CC,
I have done some searching on the net but the actual definition is hard to find, can you confirm that it stands for "Interference Monitoring System"?
Also I got asked at what is the distance at which I must reduce to the FAF maximum IAS regards YMML ILS 16 and the choice's included 5.5 and 5.7, as far as speed restrictions go which distance would be the correct one to use? IMS or RWY