SQUAT IN OPEN AND CONFINED CANALS: COMPARISON BETWEEN EMPIRICAL METHODS AND TOWING TANK MEASUREMENTS

摘要

Most seagoing vessels are designed to sail in open and unrestricted waters. When those vessels sail in shallow and/or confined canals their manoeuvrability can change dramatically. For example these vessels will endorse a sinkage and trim induced by the displacement and acceleration of a significant amount of water, this phenomenon is commonly known as squat. The squat will increase when the water depth is more shallow and/or the fairway is more restricted because of banks or quay walls nearby. An accurate knowledge of this phenomenon in such environments is important to avoid groundings or significant loss of manoeuvrability.