[QUOTEOK, fair enough. I have had the same with QF 737s. Dunno why they can't cruise at somewhere near their descent speed. Perhaps they're using RTA...][/QUOTE]
Because there is a few misguided pilots on the 737 that always say it’s most efficient to fly at Optimum and don’t want to descend when given a slow down, sure it’s most efficient for range but range isn’t the issue if you have a slowdown. If your at optimum like most you can hardly slow down at all, mid to high twenties is the far best altitude for slowing down, holding etc, as long as there’s no weather etc at that level.