Back in 1949 the US Coast Guard ran a test to determine the best way to autorotate into the water. They used surplus HOS-1s. I saw several of the landings and ditchings and I believe there were a total of ten or twelve ditchings. They used the data to standardize the method of ditching for USCG and USN pilots. If you are really interested you might contact USCG Headquarters (Aviation section) in Washington DC to see if they kept the records.
The tests took place at the CGAS Elizabeth City, North Carolina sometime between July and December of 1949.
