Port congestion data reveals disruption upside for containerships, says Clarksons 19 July 2021 Clarksons says about a third of boxships are caught up in busy ports, spurring record rate levelsAuthor: Capt. Johnhttps://www.tradewindsnews.com/containerships/port-congestion-data-reveals-disruption-upside-for-containerships-says-clarksons/2-1-1041903