The quick stop is my favorite go-to maneuver, too. But if the SF Bay tests summarized in the COB Symposium Final Report and other experiences show anything, it's that different boats -- heavy, light, multis, monos -- can require different maneuvers. The points on visibility are 1000% correct. Below is a photo taken one flat day. Even at less than 50 yards, if the swimmer weren't wearing the yellow helmet, if there were no objects behind him, and if nobody was pointing at him -- all that and you wouldn't know he's there.
Copy of Victim at 100 yards Rousmaniere. LowRes.JPG