Zarf to avoid mistakes. The United States Navy also has an item, usually made in the on-base metal shops, that is bolted to bulkheads and consoles to hold coffee cups. The Navy zarf is not ornamented. Zarf A zarf (plural: zarfs, zuruuf, zarves) is a holder, usually of ornamental metal, for a coffee cup without a handle (demitasse or fincan). Although coffee was probably discovered in Ethiopia, it was in Turkey at around the thirteenth century that it became popular as a beverage. As with the serving of tea in China and Japan, the serving of coffee in Turkey was a
Flame holder projects, is the can-type flame holder, which consists of a can covered in small holes. Much more effective is the H-gutter flame holder, which is shaped like a letter H with a curve facing and opposing the flow of air. Even more effective, however, is the V-gutter flame holder, which is shaped like a V with the point in the direction facing the flow of air. Some studies have suggested that adding a small amount of base bleed to a V-gutter helps reduce drag without reducing effectiveness. The most effective of the flame holders are the step type flame holder