Sailing has come quite a way since last I was on the water. (Which was before gps became public domain, us old people used to work with simple weather vanes on top of the mast)
Vestas sailroacket 2 is now the fastest sailboat on the planet at 65 knots / 75 mph / 121 kph, 2.5 times faster then the wind speed.
http://www.sailingworld.com/sailboats/worlds-fastest-sailboat-quantum-leap
Take that Epona.
Now what really pisses me off is the way 'flying' is portrayed in space... Just make a submarine game if those are the physics you're going to use.







