Not just head winds cross winds will have a head wind component due to the apparent wind effect.

http://www.sailingusa.info/true_wind_calculator.htm

Ducit Amour Hybridae
Mark Smith
Master Certifited Technician
Tempus non reparabilis fugit
"It isn't pollution that's harming the environment. It's the impurities in our air and water that are doing it."

Best Tank 35.0 MPG