 All these lines must be manned as the sail is deployed and the yard raised.They use a halyard to raise each yard and its sail; then they pull or ease the braces to set the angle of the yard across the vessel; they pull on sheets to haul lower corners of the sail, "clews", out to yard below.Under way, the crew manages "reef tackles", "haul leeches", "reef points", to manage the size and angle of the sail; "bowlines" pull the leading edge of the sail ("leech") taut when close hauled.