 Here, Borchgrevink and Captain Jensen were almost drowned by a large wave caused by a calving or breakaway of ice from the adjacent Great Ice Barrier.Following the path of James Clark Ross sixty years previously, they proceeded eastwards along the Barrier edge, to find the inlet where, in 1843, Ross had reached his farthest south.Observations indicated that the Barrier edge had moved some 30 statute miles (50 km) south since Ross's time, which meant that the ship were already south of Ross's record.