On Thursday, October 5, 2017 at 2:14:21 PM UTC-7, Bruce Hoult wrote:
On Thursday, October 5, 2017 at 10:12:39 PM UTC+3, wrote:
The 250 limit is "indicated air speed" not true air speed. The airliner was probably doing ~300 knots at the time of the encounter.

Well that's weird, because a B737 or A320 or whatever cruising at Mach 0.78 at 35000 ft only has an IAS/EAS of 250 knots *anyway*, even though the TAS is 450.

So unless they go faster on descent the 250 limit is pretty much meaningless.

Doesn't seem like you thought about that one much. There is no speed limit at 35000 so it is already meaningless. By the altitude that it becomes meaningful, it is meaningful.