This video shows you how to use a crocodile graph to make secondary port corrections. This will help students studying the RYA Day Skipper and RYA Coastal Skipper/Yachtmaster courses. Secondary port correction are required to find the times of High and Low Waters and the Heights of Tide at High and Low Water in secondary ports. For more information please visit www.leithnautical.co.uk. Thank you
21 ноя 2016
