How the Olympic rowing competition works:
- there are 14 boat classes (eight men and six women) with medals decided in six-boat finals
- there are eight sculling events in which two oars are used, one in each hand, and six sweep-oared events in which the rower uses one oar with both hands.
- the sculling boat classes are the single, the double and the quadruple sculls with crews of one, two or four athletes respectively, as well as the lightweight double.
- the sweep rowing categories include the pair, the four and lightweight four (for men only), and the blue-riband eight with coxswain.
- for the lightweight events, the average weight of a men's crew must not exceed 70kg with the maximum weight for crew members being 72.5kg, while the average weight of the women's crew must not exceed 57kg with the maximum weight 59kg.
- each race is conducted over 2000m. In London it will be held at Eton Dorney.
- in the men's and women's eights where there are just eight entries there are two heats, one repechage and a final. The winner of each heat goes forward to the final. The first four of the repechage make the final
- in classes with nine to 12 entries there are two heats, two repechages and no semi-finals. The winner of each heat goes forward to final. The first two crews in each repechage qualify for final
- in classes with 13 to 15 entries there are three heats, one repechage and two semi-finals. The first three crews of each heat go forward to semi-finals. The remainder go to the repechage where they must place in top three to make semi-finals. The first three crews of each semi-final go forward to the final.
- In classes with 16 to 18 entries there are three heats, two repechages and two semi-finals. The first two crews of each heat go forward to semifinals. The first three crews of each repechage go forward to semi-finals. The first three crews of each semi-final go to final.