Just wondering what tollerances ATC are working too?
I was always told +/- 10kts, as per the old IR test.
I drive a heavy bus, and the frankly rediculous speeds that ATC (in the US) ask you to fly is almost always a huge burden at the end of what can sometimes be a VERY long day! The only way (without a very long RTF interchange which always resuts in the arrogance found across the pond)that I find to manage the situation to a successful outcome is to cheat and use that +/- 10kts to your advantage
Have to say that trying my best to please US ATC has been extremely trying and very few understand the challenge of long haul/ heavy a/c flying.
As far as 160 to 4 in the UK goes, personnally never found it a problem, even in the dhc 8 (Could even manage 240 to 5 with a decent headwind
)
Thanks to the boys in the tower, sterling effort
PB