This seems to be another picture in a series I called 'Sail boat crew'. It certainly looks like the same boat - there is a mark on the mast at about half way up the frame which is replicated on a couple of the other pictures, but interestingly this is not from the same film. This picture is taken on 35mm Kodachrome whereas the other pictures were on medium format 127 film. I think the man in this picture was also in a couple of the other pictures, so this could more pictures from the same trip taken by another photographer, or it could be pictures from another trip.