Originally Posted by ERAU1978grad

It's amazing how easy it is to confuse a pilot.



Ok everybody, let's think of it in terms you are familiar with.........imagine that you are making a connection between two gates at Atlanta Hartsfield. You are standing on one of those moving sidewalks. You feel a breeze in your face because you are moving right along as fast as the guy walking on the carpet next to you. Suddenly, you turn around and start walking in the direction from which you came, at the exact same speed as the moving sidewalk. The breeze in your face stops and you look over and see that the wall next to you is no longer moving. You are stationary.

Your Inertial Nav System is telling you that your are stationary.

Therefore you have zero groundspeed.

You also have Zero IAS.

No air over wing.

Plane no fly.

Plane stay on ground.

Trust me on this.