Radio masts and towers Radio masts and towers Radio masts and towers are, typically, tall structures designed to support antennas (also known as aerials) for telecommunications and broadcasting, including television. There are two main types: guyed and self-supporting structures. They are among the tallest man-made structures. Masts are often named after the broadcasting organizations that originally built them or currently use them. In the case of a mast radiator or radiating tower, the whole mast or tower is itself the transmitting antenna. The terms "mast" and "tower" are often used interchangeably. However, in structural engineering terms, a tower is a self-supporting or cantilevered structure,
Freedom 28 Cat Ketch Freedom 28 Cat Ketch The Freedom 28 Cat Ketch (not to be confused with the Freedom 28), is an American sailboat, that was designed by Gary Hoyt and Jay Paris, first built in 1979. The design is out of production. The boat was built by Tillotson Pearson in the United States. The Freedom 28 Cat Ketch is a small recreational keelboat, built predominantly of fiberglass. It has an unstayed cat ketch rig, a transom-hung rudder and a swing-up centerboard. It displaces and carries of lead ballast. The spars are made from carbon fiber. The initial models were produced with wrap-around