They're to help the jumpers see the ground and see how close they are to the ground. Flat light on snow can make it very difficult to judge distance.
the red line is the k point where the hill goes from convex to concave, once you get past that it starts to hurt to land. the line helps hill markers to see the distance an athlete jumps
So they have a point of reference to the ground. The branches supply texture to the snow, this way freestyle skiers can tell how far they are to the ground.
Ski Jumping began in Norway in the 1860s.
Ski jumping started in the 1860s.
Ski jumping has never been disbanded from the Olympics.
Ski jumping happens the most in races and skiing lessons
Sven Eriksson - ski jumping - was born in 1907.
Sven Eriksson - ski jumping - died in 1992.
Alpensia Ski Jumping Stadium was created in 2008.
Hakuba Ski Jumping Stadium was created in 1992.
Because it is always seen that which one is performing better ski jumping.
tracks and physics
no nc is ski jumping and cross country skiing
you use skis to ski on snow and when you do ski jumping