Modern masts form the leading edge of a sail's airfoil and tend to have a teardrop-shaped cross-section. On smaller racing yachts and catamarans, the mast rotates to the optimum angle for the sail's airfoil. If the mast has a long, thin cross-section and makes up a significant area of the airfoil, it is called a wing-mast; boats using these have a smaller sail area to compensate for the larger mast area. There are many manufacturers of modern masts for sailing yachts of all sizes, a few notable companies are Hall Spars, Offshore Spars , and Southern Spars.
The purpose of building such a mockup is to test electronic interaction/interference between the Type 055's multiple radars, communications and other electronic equipment in the real world. Conducting such tests before launching the first Type 055 cruiser allows for modifications to the electronics set up to be more easily changed, as well as on site support from electronics laboratories. However, the test rig is not an accurate representative of actual Type 055 layout (the helicopter hangar in the rear has no door, and no anti-stealth radar has been installed over it, as is the case with the Type 052C and Type 052D destroyers).
Selden Masts is “Offical Spar Provider” to the 2017 SAP 5O5 World Championships
Seldén Mast Inc. (USA) as the official spar supplier for event. Seldén Mast Inc. was set up in 1998 in Charleston, South Carolina and produces rig systems for dinghies, keelboats and yachts and distributes the entire product range throughout North and South America. Seldén is a long- time manufacturer of 5O5 spars, having previously manufactured under the Proctor name. Seldén’s “Alto” aluminum section has become particularly popular among 5O5 sailors for its performance and production quality. Carbon 5O5 booms, spinnaker poles, and a full range of rigging services are also available through Seldén Mast Inc