HKG guys, apologies for lurking around the FH pages but hope I am more welcome in retirement (for a good read & excellent laff) than the four unsuccessful attempts to serve CX. But look, this reminds me of Line Training in the Trident one (E) where we used to bomb around at M8.6. Cover FO told me "Look, this guy has a thing about ground speeds. Every time there is a track change, hit the stopwatch & have the GS ready. I did. Nothing said for several track changes until, finally, track change & TC says "What's the ground speed ?".............'578' I proudly responded. "583" He said. ' Oh, that's what you make it ?' I courageously volunteered. "No, that's what it is" he rebuked !
Arfur, thanks & reciprocated. Safe fun flying !