The literature on this matter is big. Definitely you have to toss a marker buoy, a life ring incl. emergency flash or gentle which has a floating line to the person who went overboard. From the mid-1930s the USCG purchased two fifty two-foot picket-hulled motor lifeboats (MLBs) for assistance the https://forboat.eu/safety-equipment-for-boat/rescue-equipment-for-boat/