Abstract: When performing experiments in a towing tank, if the tank is small relative to the ship'smodel, the blockage effect cannot be neglected and must be corrected.
On the basis of analysis of Ship's collision accident and anti collision actions, an evaluation model is presented for ship's collision risk in narrow channel by applying fuzzy mathematics theory.
An intelligent model for a ship's horizontal motion, which can self-adapt with navigating speed, ocean condition and course, was established based on the Radial Basis Function (RBF) neural network.