Memory rope
 

Thinking about halyards an such and after reading an article somewhere
a few days ago about a synthetic material thathas two modes got me
thinking. This odd material was made of fibers that would either be
slack or would coil up like springs depending on temperature.
So.............Make halyards from it. Run a wire through it to carry
current to heat it. With no heating, its like a bungee cord that tries
to pull your sails up the mast, flip a switch and it goes slack and
your sails fall down.

OK, I admit, I been drinkin.