Flounder tramping Flounder tramping Flounder tramping is a traditional method of catching flounder or other flat fish by wading in shallow water and standing on them. This method of fishing was used in the coastal waters and river estuaries of South West Scotland for centuries. Once trapped the fish were often secured by impaling them on a leister before being bagged. A leister is the local name for a trident or three pronged long handled spear. Although traditional, the use of leisters to aid capture is no longer permitted (presumably for safety reasons). On the first Saturday each August, Palnackie, a small
Echo sounding approximately 1.5 kilometres per second [T÷2×(4700 feet per second or 1.5 kil per second )] For precise applications of echosounding, such as hydrography, the speed of sound must also be measured typically by deploying a sound velocity probe into the water. Echo sounding is effectively a special purpose application of sonar used to locate the bottom. Since a traditional pre-SI unit of water depth was the fathom, an instrument used for determining water depth is sometimes called a "fathometer". The first practical fathometer was invented by Herbert Grove Dorsey and patented in 1928. Most charted ocean depths use an average