What do V one, V R, and V two signify during flight?

V one, V R, and V two are specific indicated airspeeds that play critical roles during the phases of takeoff and landing.

V one, known as the decision speed, is the maximum speed at which a pilot must decide to continue the takeoff or abort it in the event of an engine failure. It represents the point of no return; if the aircraft is past this speed, it must continue its takeoff despite any failures.

V R, or rotation speed, is the speed at which the pilot begins to lift the nose of the aircraft off the ground to initiate the climb. This speed ensures that the aircraft has enough aerodynamic lift to safely leave the ground.

V two is the takeoff safety speed. It is the minimum speed required to maintain safe control of the aircraft after an engine failure has occurred. This speed ensures that the aircraft can safely climb out even with one engine inoperative.

Understanding these specific indicated airspeeds is essential for flight safety and performance, making option B the most accurate description of V one, V R, and V two.