Crab, as SS Marine Electric proved - the chances are pretty slim, so today CG don't do that, rescue swimmer goes to the water every time it is save for him. I read many USCG reports, and ones where rescue swimmer couldn't be deployed are very rare (mostly on Bering sea). Here, where the sea don't get so rough, rescue swimmer is always deployed and assist with pick up, the sweeping is not even practiced. and the victim is lifted with sling, stretcher, or in case of Mi-14PS in that fancy basket:
(click to enlarge)
Plus there is option for direct surface pickup, but that will work with calm sea only.