Accuracy is probably the oldest skydiving discipline, where skydivers try to land on a very small target.
An accuracy competition is a team and individual event. Competitors jump from 2,500 ft and deploy straight away, they then fly their parachutes to land within centimetres of a target.
The target is an electronic disk that measures the distance the foot hits, and records how many millimetres they landed away from the exact centre. The closest to the dead centre wins.
Accuracy is usually associated with another discipline called "Style". The goal of this discipline is to see how fast the skydiver can complete a set of freefall manoeuvres. This is usually a 360 degree left turn followed by a 360 degree right turn and a back loop, which is repeated twice. The fastest person to complete the set wins.