Make sure the crew are using safety harnesses with their life jackets. (eliminates the need for a sling). If the weather is iffy they should be using a safety line on their harness anyway.
Throw out a horseshoe (easier to spot in the water)
Throw out a Dan Buoy (you can make one yourself
) but before you need to use it Please.
Hit the M.O.B on your GPS.
Call the rescue services.
Use a catapult to fire a floating line over the persons head.
Pull them in alongside and use the boom.
Clip the end of the safety line to the boom after taking up the slack on the line undo the vang and lift the boom and the MOB with the mainsail halyard.
Alter the order as you wish.
Where to start? With due respect, other than single handers or double handers coming back in from the ocean, I don't think I've ever seen anyone wearing a harness tethered to jack lines in SF Bay or around here for that matter as well.
Many MOB buttons on the GPS are below deck at the nav station. It's much more important to stop the boat as quickly as possible and keep visual contact with the MOB. The GPS button doesn't calculate current, drift, and wave action on the MOB's position.
Working from a bouncing boom (this assumes you've got the main down and under control... this in itself takes time)
is difficult in anything other than calm water. SF Bay in an ebb tide isn't. A spare halyard can be fine for a weak or unconscious MOB. For a MOB who's just wet and cold, yet functional, you can use the tail of a sheet. Cleat the bitter end to an aft horn cleat, drape it over the side, then up to a winch. The MOB can put a foot on the line, you winch them up. We pulled a diver with full gear on out of the water using this technique.
The idea that you're dead if you fall of the boat isn't always true by any stretch of the imagination. I've witnessed two in the past three years, both in windy, cold water conditions. Great crew work and boat handling saved the day in both cases.