Originally Posted by oldgringo
Reefing, as I understand it, is when you shorten sail, leaving part of the sail exposed to the wind. Furling is when the sail is lowered completely, and secured to the boom.
Maybe some of the blow boat types can comment.
OG's got it right, though flaking a sail on a boom is not the requirement of furling--simply dousing the sail and putting it to order does. When flaked on a boom, those velcro deals look much like the "gaskets,"- lines which tie the sail to the boom or yard. And finally, blow for running down wind, but with fore and aft rigs, when tacking we "suck."