To avoid accidents on the water there are situations when rules help guide the actions of the riders. When two kiters are going in the same OR opposite direction, there is a chance their kites will hit each other, So we steer the kites apart to increase separation. The upwind kiter steers his kite upward (toward the zenith), and the downwind kiter steers his kite downward (closer to the water). The downwind kiter is more restricted in maneuverability (and is not obligated to alter course) and they may not be able to steer their kites very much. So the upwind kiter (who is the “giveway” vessel anyway) must take responsibility to move their kite upward, enough to avoid an incident.