Saggar kiln debris. Modern saggars are made of alumina ceramic, cordierite ceramic, mullite ceramic silicon carbide and in special cases from zirconia. By far the largest number of UK pottery manufacturers were based in and around Stoke-on-Trent in a region known as The Potteries. Their businesses, locally known as potbanks, fired their wares in distinctive bottle ovens. At the turn of the twentieth century over 4,000 of these were in use, although by 2014 only 47 survive, all of which are no longer in production but are listed buildings. The saggars were used for the biscuit and the glost firing. They
Ogonek class river patrol craft Ogonek class river patrol craft The "Ogonek"-class river patrol craft, also known as Project 12130, is a Russian Coast Guard vessel. The patrol craft is designed to operate in rivers, and perform various missions of the Russian Coast Guard like protecting Russian maritime borders, law enforcement, enforcement of navigation rules, search and rescue, and fisheries protection. These vessels work alongside other classes of Russian Coast Guard vessels, such as the Vosh class and the Piyavka class river patrol vessels. The patrol craft are designed similar to other Russian river patrol vessels. In terms of armament, PSKR-201, 202 are only equipped