The table on the left gives the speed of waves of different wave lengths in deep water. “Deep” in this context is not an absolute value, but is relative to wave length. The simple relationship starts to to breakdown when the depth of the water is less than 1/4 th the wave length. At that depth the bottom exerts sufficient drag on the wave to slow its motion and thus decrease the wavelength [equations and more about wave speed].
The next time this happens try being more aggressive in leaning into the wave, but more importantly, you get your down-hill oar out of the water early. You can push the up-hill oar into the water to stablize the boat and prevent rolling too far in that direction. The water will be pulling your boat and oar tip in opposite directions here, so you won’t get trapped like you did before with the down-hill oar.
The first known "modern" rowing races began from competition among the professional watermen in the United Kingdom that provided ferry and taxi service on the River Thames in London. Prizes for wager races were often offered by the London Guilds and Livery Companies or wealthy owners of riverside houses.[10] The oldest surviving such race, Doggett's Coat and Badge was first contested in 1715 and is still held annually from London Bridge to Chelsea.[12] During the 19th century these races were to become numerous and popular, attracting large crowds. Prize matches amongst professionals similarly became popular on other rivers throughout Great Britain in the 19th century, notably on the Tyne. In America, the earliest known race dates back to 1756 in New York, when a pettiauger defeated a Cape Cod whaleboat in a race.[13]
Rowing machines are an excellent and effective way to get exercise and muscle tone, thanks to their sliding seat and repetitive rowing motion, that allows the engagement of almost all major muscle groups, without the need for a lot of gear or a lot of space compared to most workout machines. Long renowned as the perfect aerobic exercise, the WaterRower is unmatched with its ability to burn calories within a perceived level of exertion. Low impact and body weight bearing, the WaterRower is perfect for any user, and each one is built from beautiful, rich wood that is sourced only from sustainably-managed forests where growth exceeds removal by 229%.

Our Wooden Rowing Machines are Made in the USA using hardwood from only replenishable sources. We strive to manufacture rowing machines that are of a stylish design and built to last, while maintaining our commitment to eco-friendliness. Our Rowing Machines are functional fitness furniture, designed not to be hidden away like other unsightly gym equipment, but to look at home in your living room. Storing in an upright position no wider than a dining room chair, our rowing machines can be easily laid out for a quick indoor rowing exercise session. 

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