The modern offshore boat typically runs all halyards and control lines aft on the cabin house to stopper banks. Usually, the pit person has only two winches to handle eight or nine lines. With so many control lines and so few winches, it's inevitable that there will be times when you're short a winch.  Deck organizers are used to lead a number of lines to a single winch, or through a narrow part of the boat.  They are used most commonly to lead several halyards to one winch.