Declare the rotor reference

A fictional rotor diagram labels the direction of rotation as counterclockwise when viewed from above. It also labels the forward velocity vector and the advancing and retreating sides. A second worksheet removes the rotation arrow but asks the learner to name the same sides using left and right. One learner repeats the first answer without checking the missing reference. The task asks what information supports a directional answer and why forward motion affects the relative flow around the disc. It supplies no aircraft model, operating speed limit or recovery procedure. The exercise is a diagram-reading problem only. A complete answer should retain the viewing convention, distinguish rotational from forward velocity and avoid importing the first diagram's direction into an unspecified rotor system.