Full-Scale Measurements of Containership Sinkage, Trim and Roll

We report on a recent project to accurately measure full scale sinkage, trim and roll of 16 deep-draft containerships entering or leaving a major container port. Measurements were performed using high-accuracy GPS receivers and a fixed base station. Results were used to calculate the sinkage of the bow, stern and bilge corners, as compared to the static condition. Overall dynamic draft increase and the governing factors affecting underkeel clearance of containerships are discussed.