All three (wind, wave, current) act independently, so they each have their own set of direction cosines. They may be aligned, they may not be.
Current is best applied using the "Power Law" selection. For wind, if you were here in the U.S. I'd suggest ASCE#7, but in Norway you may want to define either a velocity vs elevation table or a pressure vs elevation table. Just remember that when you add wind to a model, wind starts at an elevation of zero and goes up. You have to position your model (via global coordinates) accordingly.
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Regards,
Richard Ay - Consultant