[jmalicki]

Commercial airliners are sub mach1. The Charles de Gaulle is reported to go at least 27 knots at top speed.

27*16=432, a 777 goes 510-520 knots.

So maybe more like 18-19x.

For the carriers it is at least as the true top speed is classified.

[loeg]

16x, 20x -- it's about the right order of magnitude.