A light aircraft is flying at a speed of $78$m$/$s$.$ An airfoil at a specific section of its propeller is rotating at a speed of $154$m$/$s$.$ The propeller rotation disk is perpendicular to the aircraft velocity. If the propeller airfoil chord is at an angle of $30$ degrees to the rotation disk, find the angle of attack of the apparent wind for the specific section of the propeller. Present your answer in degrees.