WBF. I respect what you are saying but why would Airbus take the conscious design decision to actively inhibit the FCMC and MCDU from talking to each other so as to not update the characteristic speeds? Surely, is it not more likely that the translation process from French to English has allowed some nuanced misinterpretation of the mechanics of the system (even by people in large organisations)? I (mis?)read it as saying that at or after approach phase activation, the speeds become accurate based on current information, not predicted information. That's how you would design it yes?