If you're in the cockpit during a storm and wondering how fast the waves are moving, multiply the period between crests—say, 10 seconds—which you can get by counting or using a stopwatch, by 5.12 (5 is close enough). The answer for a 10-second period is about 50 fps or 34 mph or 291/2 knots. A close-enough approximation is that the wave velocity in knots is about three times its period in seconds. (Full disclosure: There should be a small subtraction from the period for the speed of the yacht; see page 16.)
Was this article helpful?
If you're wanting to learn about boating. Then this may be the most important letter you'll ever read! You Are Going To Get An In-Depth Look At One Of The Most Remarkable Boating Guides There Is Available On The Market Today. It doesn't matter if you are just for the first time looking into going boating, this boating guide will get you on the right track to a fun filled experience.