I think they drive aircraft carriers into the wind at about 30Kts to provide maximum flying speed.
Normally this is true for obvious reasons, but I remeber seeing a piece of film, may have been a Pathe news reel thing, from when the old Ark was working up with the Phantom for the first time. Anyway part of the work up involved zero wind launches, not sure why really unless you wanted to fly off the air group at anchor. So what with the weather in the North Sea or wherever not co-operating (strange that) they ended up driving the ship backwards downwind to get zero wind over deck. Must have been interesting for the officer of the watch rearwards visibility not being that good.