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TeachMeFinance.com - explain Significant wave height Significant wave height The term 'Significant wave height' as it applies to the area of the weather can be defined as ' The mean or average height of the highest one third of all waves in a swell train or in a wave generating region. It approximates the value an experienced observer would report if visually estimating sea height. When expressed as a range (e.g. Seas 2-4 ft) , indicates a degree of uncertainty in the forecast and/or expected changing conditions (not that all waves are between 2-4 ft). Generally, it is assumed that individual wave heights can be described using a Rayleigh distribution. Example: Significant Wave Height = 10 ft 1 in 10 waves will be larger than 11 ft 1 in 100 waves will be larger than 16 ft 1 in 1000 waves will larger than 19 ft Therefore, assuming a wave period of 8 seconds, for a significant wave height of 10 feet, a wave 19 feet or higher will occur every 8,000 seconds (2.2 hours). '. The term 'Significant wave height' as it applies to the area of coastlines can be defined as ' average height of the highest one-third of the waves for a stated interval of time'. The term 'Significant wave height' as it applies to the area of reclamation can be defined as ' The average height of the one-third highest waves of a given wave group'. Previous 5 Terms: Signals Signal-to-Noise Ratio Significant Significant hazard significant wave Next 5 Terms: significant wave period Significant Weather Outlook significs Sign-up period SIGWX About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.