Ocean carriers have responded to competitive pressures, particularly in the wake of the economic downturn, by seeking to reduce operational costs. One solution has been to run larger, more efficient ships on major trade lanes. Larger vessels allow for economies of scale and new ship designs allow for more fuel efficient operations. The largest of the new vessels are referred to as the Triple E class, which stands for energy, efficiency, and environmental improvements and will carry up to 18,000 twenty-foot equivalent units (TEUs). The ships can reach up to 1,300 feet long and 200 feet wide.