Why do pilots say “rotate” when taking off, also some say it when lowering the nose during landing?

Question

Why do pilots say “rotate” when taking off, also some say it when lowering the nose during landing?

In: 113

Answer 1

During take off, two key speeds (or velocities) are reached. V1 is takeoff speed, meaning the aircraft now has enough momentum to have to commit to the takeoff.

V2 is the speed at which you can safely takeoff on the runway length remaining with an engine failure and you are committed to taking off even if something goes wrong.

The pilot flying stops looking at any displays at V1 and focuses entirely on the outside of the cockpit.

The pilot monitoring calls rotate when they see the flight computer and HUD show the aircraft is at the correct speed, and the pilot flying then does so.