Ahoy!
Sailing tutorial - Points of Sail:
https://www.youtube.com/watch?v=0bfkIpB01dg
If you want to be among the first to try it and offer feedback, please opt-in to beta branch for version 0.6. You can find instructions how here:
http://steamcommunity.com/app/468240/discussions/0/224446432323839523/
Greg