As the one-man bridge operation are proceeding, the loads of operator are increased and the high ability are required. In this paper, the relation among the navigation information, operator's loads and handling ability are studied. First, the six kinds of the expression of the information concerning with the own ship motion under the current disturbance in the narrow fairway are examined. Next, the relation between the expression of the fairway condition and ship's position are discussed. Through these discussion, it is confirmed that the expression technique of the information is important for the ship operation, the best way of expression for the navigation in the narrow fairway are studied. The following conclusions are obtained, (1) The expression of the own ship motion must be the type to be used for the decision making directly, so the motion vector and ship's track indication are useful expression of the information. (2) The expression system which include the fairway condition and ship's position are useful for operator, the high quality information reduce the operator's loads and improve the handling accuracy.
