To enhance the skills of captains and improve the existing training technologies, it is very important and urgent to research and develop an intelligent navigation training system. Therefore we propose to incorporate a collision avoidance expert system into real-time ship handling simulator to provide intelligent decision-making support for navigation training. The intelligent tutor aims to assist the trainee to master necessary skills for handling ship in complex navigating environments such as open sea, restricted waterway, and rough sea conditions by sharing multiple captains’ experience. In this paper, the developed collision avoidance expert system will be outlined, then the proposed intelligent decision- making support for navigation training will be presented in details.