 Containership. Containerships sometimes spelled container ships are cargo ships that carry all of their load in truck-size intermodal containers, in a technique called containerization. They are a common means of commercial intermodal freight transport and now carry most sea-going non-bulk cargo. Containership capacity is measured in 20-foot-equivalent units T-T-U. Typical loads are a mix of 20-foot and 40-foot-to-T-T-U-I-S-O standard containers, with the latter predominant. Today, about 90% of non-bulk cargo worldwide is transported by container ships, and the largest modern container ships can carry over 21,000 T-T-U-E-G-O-O-C-L Hong Kong. Containerships now rival crude oil tankers and bulk carriers as the largest commercial sea-born vessels.