Investigation into the roll damping of Nova Scotia inshore fishing boats, known locally as Cape Island boats has been carried out. The roll damping coefficients are obtained for the computer simulation of Cape boat motion in large waves. Cape boats have low length to beam ratio, very shallow draft, and a deep skeg. Time history of the roll decay tests shows stiff and heavily-damped roll motions which only last for one-and-a-half to two cycles. The four models chosen in the test cover a wide range of Cape boat designs. It is found that the damping coefficients are both nonlinear and roll angle dependent. The data analysis procedure and results are presented in this paper.

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