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
Survival craft transceiver Survival craft transceiver Very high frequency (VHF) survival craft transceivers (SCTs) are lightweight, portable, two-way, handheld VHF transceivers capable of radiotelephone "on-scene communication between rescue units and the survival craft. Essentially these are hand-held VHF radio's that are used in any survival craft, such as a life boat or life raft. " SCTs with re-chargeable type batteries may be used for on-board communications as well. The International Maritime Organization (IMO) requires the following from SCTs: The SCTs used for everyday operations have a rechargeable NiCad battery, and some radios that are strictly SCTs use a non-rechargeable lithium battery pack. These