Deck Organizers lead a large number of lines through a small space. should have one more sheave than the number of control lines that are going to run through. Pass the lines between the sheaves so they can be turned to the winch on either side of the boat as a precautionary measure for whatever the situation calls for. Halyards often see very high loads because you are trying to tension fully-loaded sails, or the bolt rope or luff tape can cause friction that will make it difficult to hoist the sail. On double-stacked deck organizers, it is recommended that the higher load lines, such as halyards, are run through the lower shelves of the deck organizer.