The data for the fleet in service was obtained from the IHS/Sea-Web™database and include the ships that were in service in November 2013 and totalled 35,279 ships with a distribution per ship type ass hown in Fig. 7. While the Clarkson's fleet at risk data are classified by size classes for each ship type, they do not contain information on in-stalled power and therefore could not be used for the comparisons that are presented in this section. The aim of the comparison is to determine whether the ships involved in the accidents of interest are smaller or larger compared to the fleet in service, by placing the size and installed power within the context of the fleet.