Ojos del Salado was even higher than Ojos del Salado. Later measurements using more precise equipment showed that Ojos del Salado is about higher than Pissis. Furthermore, in 2007 a Chilean–Argentine–European expedition organized by Andes Magazine and Azimut 360 performed a survey on both Ojos del Salado and Monte Pissis using more accurate instruments. It found the former to be and the latter Although this fits within recent handheld GPS surveys, which have estimated the mountain to be between and , the vertical error margin of the expedition's equipment, , leaves uncertainty as to the mountain's more precise altitude. Ojos del Salado has
Seven Second Summits Seven Second Summits The Seven Second Summits are the second-highest mountains of each of the seven continents. All of these mountain peaks are separate peaks rather than a sub-peak of the continents' high point. The Seven Second Summits are considered by many mountaineers and geographers as a much harder challenge than the traditional Seven Summits. Austrian mountaineer Christian Stangl became the first person to successfully climb the Second Seven Summits. Stangl climbed all possible candidates for the Second Seven Summits quest (K2, Mt. Logan, Ojos del Salado, Batian, Mt. Tyree, Dych Tau, Dufourspitze, Sumantri, Ngga Pulu, Puncak Trikora, Puncak Mandala