Cunningham: Line for tensioning the luff of the mainsail. Reefing lines: Used to reef the mainsail. In Seldén’s Single-Line booms, both the leach and the luff are reefed by pulling one line. Seldén colour-codes the reefing lines as follows: • Reef 1: Blue line. • Reef 2: Red line.

Topping lift Reef 2 Reef 1 Cunningham Outhaul Vang Mainsheet Preventer guy Genoa/jib sheet

Topping lift: Used to prevent the boom end dropping into the cockpit when not supported by the sail, for example while reefing. Vang (Kicking strap): Prevents the boom end from “lifting” when sailing downwind. Flattens the sail, and reduces twist. Often combined with Seldén Rodkicker, which takes over the function of the topping lift.