Scott was at the south summit 8,750 m (28,700 ft) of Mt Everest at 2:35 am local time. Main summit is at 8,848 metres (29,029 ft).
8:26 pm Nepal time: Scott has just departed Camp IV and is headed for the summit of Mt. Everest ETA 5 am Nepal time/7 pm EDT - perhaps earlier.
Scott is using his SPOT Satellite Personal Tracker to check in. You can follow his progress all the way to the summit by checking his personal tracking page . Select "terrain" to see how close he is getting to the summit of Mt. Everest.