1. According to "The Handbook of Modern Square Dancing" by Jay King...

   UNLOAD THE BOAT (author: Fred Christopher 1967)

   From Eight Chain Thru.
   All California Twirl;
   Centers Pass In and Pass Thru
   as Ends Divide, pass one dancer moving around
   the outside and then Pass Out with the next
   (i.e., Ends 1/4 Out, Circulate, and Pass Out).
   Ends in a Squared Set with everyone facing out.

2. According to the April 1992 issue of "The New View" by Bill Davis...

   UNLOAD THE BOAT (author: Ricky Chatwell 1992)

   From an Eight Chain Thru.
   Pass Thru, Partner Tag, Circulate.
   Ends in Facing Lines.

I like the '1992' version better.