Africa’s inefficient and aging ports are hampering the continent’s chances of capitalizing on a surge in ship traffic that’s avoiding attacks by Houthi rebels through the Red Sea, logistics experts said. The number of vessels sailing around the southern tip of Africa is up 85% from the first half of December, when the Iran-backed, Yemen-based terrorists intensified their attacks on ships, according to Clarksons Research. Some of the biggest beneficiaries are ports in South Africa, Madagascar, Mauritius, and Namibia, all of which have seen volumes rise, manufacturing and logistics company Fictiv Inc. said.