[Boxxed]

> The information to properly land the plane is in the manual. The required air speed and altitude have never been a secret, if you read the manual (which I guess most kids didn't).

It's also on-screen. What's missing is the acceptable ranges -- +/- 100 for altitude, +/- 50 for speed, per the post. Knowing that the slop for altitude is much higher is definitely helpful information.