2D Steering System
2D system is generally similar to the classic one - pilot has but two main steering handles to steer. However, it's operation is significantly different. Due to division of main steering lines (there are two for each side now, with one of them going outside of the pulley), an experienced pilot can modify steering progression according to his own preferences.
The rigging scheme was designed for low progression in low and middle speed ranges, so that pilot has better control of the wing. At high speeds (trimmers released and speed system engaged) only the outer steering lines or special systems (TEA/TST) should be used.
Basic rules of 2D operation on Hadron's example