I watched the Robert Redford movie All Is lost, and as much as it wasn't the best movie i have ever seen, i did see something that makes me raise a question, during the movie he winched himself up the mast, did something (not sure what) then winched himself back down, using what seemed to be a ratchet style thing????? Was this a movie prop, or is there such a devise?? if so what is it ?? where do i buy one from ???? Happy New year to all sea breaseres......