Most races that are held in the spring and summer feature side by side racing, or sprint racing, sometimes called a regatta; all the boats start at the same time from a stationary position and the winner is the boat that crosses the finish line first. The number of boats in a race typically varies between two (which is sometimes referred to as a dual race) to eight, but any number of boats can start together if the course is wide enough.

Rowing is a cyclic (or intermittent) form of propulsion such that in the quasi-steady state the motion of the system (the system comprising the rower, the oars, and the boat), is repeated regularly. In order to maintain the steady-state propulsion of the system without either accelerating or decelerating the system, the sum of all the external forces on the system, averaged over the cycle, must be zero. Thus, the average drag (retarding) force on the system must equal the average propulsion force on the system. The drag forces consist of aerodynamic drag on the superstructure of the system (components of the boat situated above the waterline), as well as the hydrodynamic drag on the submerged portion of the system. The propulsion forces are the forward reaction of the water on the oars while in the water. Note also that the oar can be used to provide a drag force (a force acting against the forward motion) when the system is brought to rest.

I am happy with this rowing is quiet and offers good resistence without puttong too much stress on my joints...HOWEVER...the electronic counter has NOT worked from day one!!!..pulling the handle does NOT activate the meter at all!...I hve pluged in the wires and repeated that process SEVERAL times..BUT...nothing!!...I can activate the meter is USELESS for registering any rowing activity!!..As I said...good rower....USELESS Eleconic meter!!!

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]
A 125-pound person moving at an average pace for 30 minutes on a treadmill will burn roughly 250 calories. However, they aren’t able to take advantage of this after-burn effect. The same person rowing vigorously will burn around to 250 calories but will have less stress placed upon their joints and continue to burn calories after the workout has ended. Rowing machines have been shown to burn on average 800 calories an hour if you work harder and are slightly heavier.

According to Fritz Hagerman, Ph.D., a professor in the Biological Science Department at Ohio University, “Competitive rowers expended almost twice the number of calories on a 2,000-meter course as a runner in a 3,000-meter steeplechase.”1 However, since rowing is low impact, you will not experience the same wear and tear on your body that you would if you were a runner. Plus, you build strength in your upper body and core.

Motion of the water is different than the motion of the wave. Water at each location moves in a circular path, but the motions at different locations are “out of phase”, which means that when water at the left of the diagram is moving to the right, water a quarter of a wavelength to the right is moving down, and water next to it is moving to the left, and next to it is moving up, etc. The overall effect is a an “apparent” wave moving to the right. Thus, the velocity (speed) of a wave is not at all the same as the velocity of the water.
Decreasing  speed of waves as water becomes shallow has dramatic consequences on the beach. As the waves slow, their profile (Figure on right) is laterally compressed and since each wave must carry the same energy it becomes higher. As the wave approaches shore this process continues until the height exceeds 1/7 th the wave length and the wave becomes unstable. Then the wave breaks.
I would like to begin reviewing the screen. It’s quite simple to use. It doesn’t offer many things and that is what anticipated in a rowing machine that is under $150. As the LCD screen is too small, you need to keep yourself motivated some way or the other; music is a good way by the way. It’s only an easy screen that can show some basic information while you row such as the length of time you rowed in a single session and how much you’ve rowed. Additionally, it can give you a good idea about the approx. number of calories burned and strokes performed.  And that’s it. The LCD screen doesn’t show anything new. No preset applications are contained, and there is no way to save your workout information.
Flywheel sits in enclosed water tank to provide smooth, quiet, self-regulated resistanceSeries 4 performance monitor tracks workou...t intensity, stroke rate, heart rate, and moreHandcrafted rowing machine with "water flywheel" that replicates actual rowing feelStores upright; measures 83 x 22 x 21 inches (L x W x H) and weighs 108 poundsNo impact and Non-Load Bearing, perfect for users with Joint concerns read more
As far as “racing”, I said an air rowing machine is better because the Concept2 is the only model used for indoor rowing competitions, setting world records, and entering your actual scores online. It is because their monitor can calculate the drag factor of the flywheel in real time and accurately calculate distance and time. Small changes such as dust build up, air temperature, and humidity will not change the times between different machines because the drag factor is calculated every stroke.
John Duke, creator of the WaterRower, was inspired to try his hand at invention while working at a subsidiary for U.S. Steel. He wanted to make an indoor machine that felt as much like real rowing as possible, with a focus on aesthetics. It took him two years to get the design right, moving past failed ideas such as a flipper in the tank instead of a clutch. What began as a series of doodles at his desk turned into a sculptural piece of exercise equipment that upends expectations in two ways: by bringing water indoors, and by looking elegant and artful when stored.
Water Rower Dimensions: 82.25" x 22.25" x 19.63" / Weight: 88 Lbs (Empty Tank), 125 Lbs (With 171 Liters Of Water) ; Maximum User ...Weight And Height: 1000 Lbs & 38" InseamExercise Rower Features Stainless Steel Makeup With Brushed Stainless Steel 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