The first phase is orienteering on horseback (POR), where riders follow a route on a map at speeds predetermined by the organisers. It is not a case of fastest wins, at Level 2 you can expect to cover 20km in 2 to 3 hours with some trot and the occasional canter.
The section starts with a session in the Map Room where competitors copy the route onto their own map from a master map. They start the ride with 240 points and get penalised for every minute too fast or slow that they arrive at the designated checkpoints. Points can also be lost by missing good tickets or finding bad tickets. At the end of this phase, the competition with the score closest to 240 is in the lead.
At Levels 1 and 2 the navigation is fairly straight forward but from Level 2a upwards competitors can be asked to navigate with bearings or grid references. At the highest level it is not unheard of for all competitors to be on a minus score as the navigation is so difficult.