Originally Posted by
BOAC
...and should read and hopefully re-thought, having seen vanes moving on walk-rounds in a stiff breeze!
With all due respect, there's a difference between "moving" and "providing valid data".
I'm sure the intention was well-founded, but hindsight tells us the application was not, and WoW would have been far better.
See above - I'd be surprised if WoW was not an input *in addition* to the <60kts IAS check, as opposed to "instead of". This is purely a way of preventing duff data from getting into the flight control systems calculations - entirely separate from air/ground mode determination.