mainsheet traveller
mainsheet track

Mainsheet traveller control is powerful, but the traveller itself is very short.

ClamCleats may be present to allow this mainsheet traveller to be adjusted.

With this configuration, complexity of sail control is elevated by the addition of dynamic outhaul, downhaul, and mainsheet traveller lines.

The mainsheet traveller tore off the deck and began a chain reaction: next to go was the boom vang, and this caused the boom to fracture at the gooseneck, overloading the mast check-stay which parted.