The document summarizes the history and operation of a unique boat transportation system in Scotland. It describes how two canals were originally connected by 11 locks due to elevation differences, but are now connected by a large water carousel that was completed in 2002. This rotational boat transporter, the only one of its kind in the world, uses two large arms filled with water that rotate 180 degrees in 15 minutes to transport boats between the upper and lower canals, saving both time and energy compared to using locks.