Spinnakers are symmetrical full-bellied sails of nylon fabric hoisted on Dacron halyards.
The leeward clew is controlled with a sheet led to a fiddle block well after on the toe rail, then to a Figure 1-13, Preventer. 1-21 secondary winch in the cockpit. See Figure 1-14, Sail Plan. The mainsail on the Navy 44 is made of 9.25 oz Dacron with a total sail area of 406 square feet. The mainsail is not an exact triangle.