Beaufort scale used in Taiwan and mainland China, which are often affected by typhoons. Internationally, WMO Manual on Marine Meteorological Services (2012 edition) defined the Beaufort Scale only up to force 12 and there was no recommendation on the use of the extended scale. Wind speed on the 1946 Beaufort scale is based on the empirical relationship: Where "v" is the equivalent wind speed at 10 metres above the sea surface and "B" is Beaufort scale number. For example, "B" = 9.5 is related to 24.5 m/s which is equal to the lower limit of "10 Beaufort". Using this formula the highest
Daniel Cornelius de Beaufort succeeded by Samuel Grove. De Beaufort married Esther Gougeon and they had a son Daniel Augustus Beaufort (1739–1821) who was a priest and distinguished cartographer. His son was Sir Francis Beaufort (1774-1857), Royal Navy officer and hydrographer and the inventor of the Beaufort Scale for indicating wind force. In 1746, de Beaufort accompanied the Earl of Harrington to Ireland as chaplain and in 1747 he received the benefice of Navan, Meath. In 1753 he was appointed to be Provost of Tuam and he later became rector of Clonenagh. Daniel Cornelius de Beaufort Daniel Cornelius de Beaufort (1700-1788) was rector of