10 knots or less...not the kind of scenario that a MOB incident would likely occur...
That is exactly the scenario my daughter got knocked off our boat. Moderate winds and an accidental jibe. A bump from the boom and she was in the water. Not a real big deal, as everyone wears life jackets. I tacked quickly sailed back up to her, but it still was probably 15 minutes before she was back in the boat. Once the boat was on course, I ran to grab a 30 ft line I keep on board. Cleated it down. When we passed her, I threw her the line. Once she had the line, it was simple enough to pull her back to the boat.
A couple of mistakes I made that require changes in how we do things. By law, you are required to have a throwable cushion handy. I believe you are also required to have a line attached to it. We had the cushion, but no line attached. We now have the line attached to the cushion. It is coiled such that it will fully extend without tangling. If we had had the line attached in the first place, we would probably have not even needed to tack. Just throw the cushion as soon as she went over, and she could have swam to it before we got away.
It should be pointed out that when we sail in rough conditions, everyone is careful, and it is very unlikely to have a MOB. Its in moderate COMMON conditions where we get complacent.