Rowing events use a systematic nomenclature for the naming of events, so that age, gender, ability and size of boat can all be expressed in a few numbers and letters. The first letter to be used is 'L' or 'Lt' for lightweight. If absent then the crew is open weight. This can be followed by either a 'J' or 'B' to signify junior (under 19 years) or under 23 years respectively. If absent the crew is open age (the letter 'O' is sometimes used). Next is either an 'M' or 'W' to signify if the crew are men or women. Then there is a number to show how many athletes are in the boat (1,2,4 or 8). An 'x' following the number indicates a sculling boat. Finally either a + or – is added to indicate whether the boat is coxed or coxswainless.
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.