https://www.maritime-executive.com/article/south-africa-trade-returns-to-growth-but-east-africa-rising

Industry analyst Dynamar has released its East and Southern Africa (worldwide) Container Trades 2019 by Darron Wadey, noting South Africa struggled in 2017 but has now seen a return to growth.
The East Africa, Southern Africa and Indian Ocean Islands trade, abbreviated as ESAf, has a coastline stretching some 21,000 kilometers, with fronts on the Atlantic and Indian Oceans. Only part of South Africa and all of Namibia possess South Atlantic coastlines.