Unit 0 MKIV Underdeck

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. The small outside drum diameter lets unit fit inside narrow bows.

Ball bearings between the center hub and deck bearing provide low-friction furling. The through-deck bearing minimizes water seepage into the underdeck compartment.

A one-piece integrated deck bearing and line guard provides durability and corrosion resistance.

The torque tube houses a full-length turnbuckle for optimal mast rake and tension adjustment. The Unit 0 features an articulating ball joint, eliminating the universal joint and toggle to reduce weight and to simplify maintenance.

The Unit 0 furler and headstay are independent of each other, allowing flexible installation options.

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