OK, I need a clarification on the mentioned subject. For example if MAS is 15 MPH and ATC is showing 40 MPH which speed should I use? I suppose lower one which is 15 MPH. Why then ATC is not showing 15 MPH as well? If I go 40 MPH I will get minus AP for driving above speed limit o_O. This is just one of many situations. Except Atlantic terminal where 5 MPH is the limit what is understandable because ATC can not go below 15. I read carefully guides and I know ATC can show different values but it should not be above MAS shouldn't be? Thanks in advance. Cheers!