MOB! The USCG uses a dummy specifically designed for the purpose. It gets dramatically heavier every minute it's in the water.
Every time a US passenger carrying vessel comes up for her COI, you must take the vessel out with her crew and the CG officer will toss this dummy (no not me, the one he brought) in the water. I want all you guys (and gals) out there to think; 84' three masted gaff rigged schooner under full sail in 10 to 20 knots of wind.
Somebody must call a mayday on the radio (usually the captain), someone (usually a passenger) must be spotting the person in the water, pointing, to help the captain keep the person in the water in sight, while the crew is handling all those sails AND preparing the equipment to rescue the person in the water. If I remember correctly you have 5 minutes to save the dummy, no if's and's, or but's, or you don't pass, period. All this with a crew of 2 or 3, plus captain.
This is the only thing I think the USCG does properly in the whole mess of licensing small (under 1600 tons) passenger carrying vessels and personnel.
Are you familiar with the "Williamson turn" (there are others, but I believe this is the preferred method for MOB)?
If you want to do MOB drills, do it like it was for real. Set a realistic time limit, and use something in the water that is as difficult to get aboard as an exhausted or unconscious person (say 2 [80#] or 3 [120#] jerry jugs full of fresh water and a life jacket). It isn't by any means, just about getting the boat back to the person in the water, at least if you actually want to be able to save a life, one day.