Douglas scale

British

noun

an international scale of sea disturbance and swell ranging from 0 to 9 with one figure for disturbance and one for swell

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Etymology

Origin of Douglas scale

C20: named after Sir Henry Douglas (1876–1939), former director of the British Naval Meteorological Service

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