Containership lines are drifting back to West Africa trades, despite a drop in freight rates and serious congestion in some of its major ports.

This week, Hong Kong's Orient Overseas Container Line will enter the Asia to West Africa trade by taking slots on a service operated by sister company Cosco Shipping Lines.

Separately, Hapag-Lloyd is poised for a November launch of a second North Europe-West Africa weekly link focusing on Senegal and Mauritania, with Arkas Line taking slots on a service using four 1,700-teu vessels.