floating bocks outhhaul

A couple weeks ago my coach was out of town so i had a subsitute coach. this coach told me that i need to instal a "floating blocks outhaul":confused: on my boat. When my coach came back he had no idea what it was:confused:. I am just wondering how it works cause my outhaul configuration suck right now. Anyone know what it is?
 
he probably wants you to use 2 control lines and cascade 1 system inside the other. when you do that, the block that connects the lines will be "floating"
 

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