Ketch (It follows that a schooner does not have a mizzen mast.) If a vessel has two masts of approximately the same height, the rig with the larger sail forward is called a ketch, while the rig with the larger sail aft is a schooner. The American two-masted schooner is rare in Europe, where the ketch rig is preferred. In the year 1775, various ketches were utilized as warships by the Sultanate of Mysore during the rule of Hyder Ali. During the 17th and 18th centuries, ketches were commonly used as small warships, until superseded in this role by brigs during
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