Experimental investigation of the seakeeping of a frigate model

The paper presents a set of experimental ship-motion data useful for the validation of seakeeping codes. In order to simplify the interpretation of the flow around the 5415 model, the experiments were performed on the bare hull, without appendages and propulsor. The ship motion is excited using the transient test technique, i.e. by a single transient wave train sufficient to determine the Response Amplitude Operator of the model. The shortness of the test, and the rapidly evanescent wave elevation downstream the focusing point, reduce the problems due to reflected waves