Vale’s very large ore carriers (VLOCs) could cause a “catastrophic” pollution incident if one ran into trouble, the Chinese Shipowners’ Association (CSA) has warned.

Its latest broadside at the Brazilian mining giant’s bulkers comes in the wake of the structural damage suffered by the a 400,000-dwt Vale Beijing (built 2011) prior to its maiden voyage (see main story, left).

“Such mega-ships have been newly built...