Multiple studies and classical oceanographic theory support the principle that Ekman transport and wind forcing cause surface ocean waters to move at an angle to the direction of the wind due to the interplay of Coriolis force and friction.
The claim states that Ekman transport causes surface waters to move at an angle to the wind direction. Papers [1], [2], [5], and [8] all discuss wind-driven surface currents and Ekman dynamics, confirming that surface waters move at a deflected angle relative to the wind. Therefore, the claim is supported.