Ketch Ketch A ketch is a two-masted sailing craft whose mainmast is taller than the mizzen mast (or aft-mast). The name "ketch" is derived from "catch" or fishing boat. Historically the ketch was a northern European square-rigged vessel, often a freighter or fishing boat, particularly in the Baltic and North seas. Nowadays, a ketch tends to be a fore-and-aft rigged pleasure yacht, similar to a yawl; but a ketch's mizzen mast is taller and its mizzen sail is larger than a yawl's. The large fore-and-aft sail on the mainmast is the mainsail, while the sail on the mizzen mast is the
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