The objective of the American Towing Tank Conference (ATTC) is to promote exchange of knowledge and stimulate research for the purpose of improving methods of model-and full-scale experiments and numerical modeling used for predicting full-scale performance of ships and marine installations. This includes the design of facilities, equipment, instrumentation, experimental techniques, and uncertainty assessment, correlation of testing, verification, validation, and application of methods of predicting full-scale performance, and formulating collective policy on matters of common interest.