The earliest free fall discipline
4 Way Formation Skydiving (FS4) is the earliest free fall discipline. It was identically reproduced for skydiving.
Each team of four skydivers must complete a sequence of 5 or 6 different formations as many as times as possible in a horizontal position known as “flat tracking”. The time allotted for completing these formations is 35 seconds. The purpose of the challenge is to complete the highest possible number of formations during this working time.