Harken Unit 2 Underdeck Furling System Harken’s MKIV Underdeck Furling is the perfect solution for performance racers and cruisers who want an aerodynamic system with a minimal amount of equipment above deck. The drum is located beneath the deck, lowering the tack height for maximized sail area. Technical Description B (mm) 167 mm B (in) 6 5/8 in Wire Ø (1 x 19 SS) (mm) 10 mm Wire Ø (1 x 19 SS) (in) 5/16 in Rod Ø (mm) 8.38 mm Rod Ø (dash) -17 Clevis pin Ø (mm) 15.9 mm Clevis pin Ø (in) 5/8 in Standard headstay length (m) 18.38 m Standard headstay length (ft in) 60.4 ft in Maximum headstay length (m) 20.51 m Maximum headstay length (ft in) 67' 4" ft in A minimum (mm) 322 mm A minimum (in) 12 11/16 in A maximum (mm) 471 mm A maximum (in) 18 9/16 in C minimum (mm) 137 mm C minimum (in) 5 3/8 in C maximum (mm) 287 m C maximum (in) 11 5/16 in J (mm) 32 mm J (in) 1 1/4 in K (mm) 36 mm K (in) 1 3/8 in Extrusion length (m) 2.13 m Extrusion length (ft in) 7' ft in Luff tape size (mm) 5 mm Luff tape size (in) #6 (6/32) in
