Yawl Yawl A yawl is a two-masted sailing craft whose mainmast is taller than the mizzen mast (or aft-mast). Compared to a similar sized ketch, a yawl's mizzen mast is set further aft and its mizzen sail is smaller. Historically, the yawl was a commercial working vessel, but today, the yawl is a fore-and-aft rigged pleasure yacht. In Europe yawls are much less common than the more popular ketch. The yawl was originally developed as a rowboat with two small masts to assist the oarsmen. (When adding a sailing rig to a rowboat, the masts must not interfere with the rowers;
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.