Trimaran sailplan. They contribute to drag when heavily immersed, and their level of immersion indicates when to reef. Two types of trimaran exist: the regular trimaran and the open trimaran, which features a trampoline between the hulls instead of plating. Trimarans have a number of advantages over comparable monohulls (conventional, single-hulled sailboats). Given two boats of the same length, the trimaran has a shallower draft, a wider beam, less wetted area, and is able to fly more sail area. In addition, because of the righting moment provided by the wide beam, trimarans do not need the weighted keel that is required
Junk box Junk box Junk box is a term used by amateur radio operators (hams) to describe a collection of spare parts and old equipment kept to assist in building and repairing their station. Typical items found in a junk box are electronic components such as resistors and capacitors as well as small parts such as screws, nuts and bolts. A junk box may also contain surplus, cast off or used electronic gear. Radio amateurs who construct their own equipment, known as homebrewers, often have large or well stocked junk boxes. According to some hams, a well-stocked junk box is a requirement