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 In Germany the Bielstein transmitter collapsed in 1985. Tubular masts were not built in all countries. In Germany, France, UK, Czech, Slovakia, Japan and the former Soviet Union, many tubular guyed masts were built, while there are nearly none in Poland or North America. In several cities in Russia and Ukraine several tubular guyed masts with crossbars running from the mast structure to the guys were built in the 1960s. All these masts, which are designed as 30107 KM, are exclusively used for FM and TV transmission and, except for the mast in Vinnytsia, are between 150 and 200 metres