Wishbone rig Wishbone rig A wishbone rig is a type of rigging on sailboats. This rigging is most popular on heavy two-masted vessels. On a ketch it is called wishbone ketch and is considered a subtype of ketch rigging. A wishbone ketch rigged vessel is a vessel that is rigged as a ketch where a permanent splitting gaff is mounted between two masts. Contrary to the gaff rig (where the gaff is hoisted together with the sail) the gaff stays in the mast. The gaff is typically fixed on the first mast (the one closer to the front) and fixed via a
Radio masts and towers sometimes also constructed out of steel tubes. This construction type has the advantage that cables and other components can be protected from weather inside the tube and consequently the structure may look cleaner. These masts are mainly used for FM-/TV-broadcasting, but sometimes also as mast radiator. The big mast of Mühlacker transmitting station is a good example of this. A disadvantage of this mast type is that it is much more affected by winds than masts with open bodies. Several tubular guyed masts have collapsed. In the UK, the Emley Moor and Waltham TV stations masts collapsed in the 1960s.