Weight distribution on a hoist is different from a diesel and there was more of a chance and worse consequences if the OB swamps.
Or I could be making s#&!t up. Too many blows to the head playing football tends to combine unrelated info in my head
Edit,
http://www.rib.net/forum/f45/zodiac-...3-a-31001.html
I was close, not hoist, stern launch apparently.
Jason