The horizontal movement of the water when a wave passes is approximately equal to the up and down movement of the water. If you are on flat water and are parallel to waves made by a passing boat, your boat will move side-to-side as much as up-and–down as the wave passes under you. The side-to-side movement actually creates most of the difficulty in balancing the boat in such a situation. However, under typical conditions in the bay there can be such varied wave action that you can’t easily distinguish horizontal and vertical motion.

The Waterrower has recently been made famous by Kevin Spacy as the rowing machine used in the ‘House of Cards’. It is a type of wooden rowing machine produced and manufactured by Waterrower Inc. in New England, USA. The rowers were designed by ex-US national team rower john Duke in the mid 1980’s and the company to manufacture them was established in 1988.

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].
In the 1950s- and 1960s, more sports coaches began to use rowing machines for training and assessment of athletes' performance. One such rower developed at this time was the Harrison-Cotton machine, the brainchild of John Harrison of Leichhardt Rowing Club in Sydney and Professor Frank Cotton, produced by Ted Curtain Engineering. This was the very first piece of equipment able to measure athletic power with great accuracy, and it also imitated the actual experience of rowing more closely than any previous rowing machine.
The rowing machine itself is unlike any other on the market with its patented water filled flywheel. It is hard to exactly copy the action of a scull on the water, but the mechanics of the flywheel spinning in water comes in a close second on dry land. The fact that the water is 800 times denser than air means that there is no need for any extra resistance or dampening that you will find in normal air rowers. The faster you pull, the more resistance is generated giving it infinite variability. However, if you want to be able to practice rowing with a faster stroke, you will have to reduce the amount of water in the tank unlike an air rower where you just have to adjust the baffle.
Water Rower Dimensions: 88" x 22" x 28.5" / Weight: 79 Lbs (Empty Tank), 116 Lbs (With Water); Maximum User Weight And Height: 700... Lbs & 38" InseamExercise Rower Features Aluminum Makeup With Powder-Coated Aluminum Finish For High DurabilityBoasts Patented Water Flywheel Responsible For Its Natural Rowing Dynamic-Like Actually Driving A Boat With Oars! Other Features: Self-Regulating Resistance Levels-Making It Suitable For Any User, Little Maintenance Required (Tablets Available From Manufacturer Free Of Charge) And Inclusive Of S4 Performance Monitor (Displays Intensity, Kcalories/Hour, Stroke Rate, Heart Rate, And More! Enjoy 1 Year Commercial Warranty (Upgradeable To 3-Year Parts While 5-Year Frames Are Free Of Charge With Registration) read more
Performance is meaningless if you can’t or don’t want to use the equipment, and that’s why the Wave Water rower was built for comfort and convenience. With a wide, molded seat to accommodate users of all sizes and a padded, textured rowing handle, you can build your strength and endurance in ease. When setting up the rower, the leveling endcaps with a dial ensure stability. After your workout, storing your Wave Water rower is easy – just fold the frame and roll the rower into a closet or corner.

In addition to its natural, fluid resistance, the Elite Wave Water Rowing Machine features many performance upgrades that push you to row harder, faster and longer. When mounting the rower, you will immediately notice the ease and customization of the footplates and straps. The footplates, which accommodate a wide range of foot sizes with their adjustable length, feature a heel strap that secures the feet while also allowing the heel to rise higher for a wider range of motion. There are also quick-adjust straps with finger loops so you can quickly secure your feet – even in the middle of the workout. Once you push, extend and bend, the seat glides atop the aluminum rowing beam, providing a smoother workout.
The resistance of your rowing machine impacts how it moves. Select from hydraulic and magnetic rowing resistance. Hydraulic rowers are typically more compact in size, while magnetic machines make little noise as they operate. Details like easy-to-reach tension knobs or buttons allow you to increase or decrease the intensity of your resistance as you train.
Bring the experience and benefits of rowing on water with this professionally-built Stamina water rower machine. The incorporated water resistance in this exercise machine offers smoother and more consistent rowing but more importantly, just like rowing in an actual body of water, this workout machine is built to provide infinite resistance--harder and faster rowing motions cause increased resistance. To tailor the resistance according to your fitness goals, simply increase or decrease water level using the siphon included in the package. Moreover, the steel frame construction and rowing beam ensure durability for years while the sturdy, pivoting footplates with straps offer comfort and security. To help you keep track of your fitness progress, this home gym machine is also equipped with a multi-function monitor that tracks total strokes, strokes per minute, distance, time, and calories burned. Other features include: wide molded seat, textured and padded handles for better and comfort
By charter, the Schuylkill Navy’s object is "to secure united action among the several Clubs and to promote amateurism on the Schuylkill River."[23] Over the years, the group has had a role in certain ceremonial and state functions.[24] The success of the Schuylkill Navy and similar organizations contributed heavily to the extinction of professional rowing and the sport's current status as an amateur sport.[25]
It is time to get into shape.  After doing some research and talking to a few experts, at least more expert than me, I determined rowing and swimming would be the best for me to loose weight with less strain on my body.  I researched and decided to rent (not buy) a Water Rower.  The one page rental application  is simple to complete and the staff telephone contacts were great, they answered questions, provided updates, made suggestions  etc.   The equipment showed up as promised.  Assembly is very simple one person job  and took just about a half hour, only one small allen wrench is required and it is provided. (save the box, its big but needs to be saved in the event you return the equipment)  The machine is classic and elegant.  It is not silent but the water swoosh sound is quite relaxing and soft.  I rented a previously used matching which is slightly less expensive  and shows a tiny bit of use but its exercise equipment so it is expected.  Customer service is outstanding and friendly.  The equipment seems really well designed and is simple to stand up and get out of the way.  The only issue I had involved the the filling of the tank.  Its cumbersome and could be made easier by a more convenient placement of the fill hole, it seems to be a slight design flaw.  I used a new long funnel (used to add oil to a car).  I checked out a few Youtube posts and videos and other users had the same minor complaint but overall everyone is really happy with this equipment.  NOW I NEED to MAKE MYSELF USE IT.
In general, multi-boat competitions are organized in a series of rounds, with the fastest boats in each heat qualifying for the next round. The losing boats from each heat may be given a second chance to qualify through a repechage. The World Rowing Championships offers multi-lane racing in heats, finals and repechages. At Henley Royal Regatta two crews compete side by side in each round, in a straightforward knock-out format, with no repechages.
The advantages with air rowers is that there is smooth action; there is only small wear and tear to its mechanism; its automatic feature adjusts according to your rate of strokes; and there is a wide range of the resistance readily available in replicating the feel of rowing through the waters. The only disadvantage of this machine is that it tends to be noise indoors.
At the collegiate level (in the United States), the lightweight weight requirements can be different depending on competitive season. For fall regattas (typically head races), the lightweight cutoff for men is 165.0 lb. and 135.0 lb. for women. In the spring season (typically sprint races), the lightweight cutoff for men is 160.0 lb., with a boat average of 155.0 lb. for the crew; for women, the lightweight cutoff is 130.0 lb.[48]
In sweep or sweep-oar rowing, each rower has one oar, held with both hands. This is generally done in pairs, fours, and eights. In some regions of the world, each rower in a sweep boat is referred to either as port or starboard, depending on which side of the boat the rower's oar extends to. In other regions, the port side is referred to as stroke side, and the starboard side as bow side; this applies even if the stroke oarsman is rowing on bow side and/or the bow oarsman on stroke side.