As a professional you endeavour to do your best with speed constraints- if not, simply speak out- however (though my profile states that I can indeed hover at the drop of a hat) in reality whilst at D7 on the ILS maintaining 180kts (an atc instruction) being asked to maintain 160kts to D4 is, for most jet liners (though especially the 757), a pointless request- especially when in the clag with anti-ice on the go.
The two way understanding between ATC'ers and flight crew has improved over the years through, in my opinion, such liaisons as the latter visiting the former's workplace- seeing it all unravel, as it were. Controllers coming along on flights to see how it is put into practice would only help both communities acquire more of an understanding of both professions.........
Don't get me wrong, most of the controllers (especially at London's Sussex airport) are top class....
