Wishbone boom
The wishbone boom on sailing craft is most commonly seen on windsurfing boards (sailboards).
The wishbone boom on larger sailing craft is a double-sided boom set at an angle to the mast and typically supported by line stays from the leading edge of the mast to each side of the boom. The sail's foot (outhaul) and luff (vang) tension are adjusted simultaneously by the use of one line, called a snotter or a choker.