In recent years the marine transportation system has come under increasing attention. Among the concerns are its safety and efficiency, prevention of and response to ship-caused pollution, and the use of vessels for inimical purposes, ranging from simple lawbreaking (such as smuggling) to serving as a vehicle or target for terrorist acts. Over the past two decades, automatic identification systems (AIS) have been developed in response to these concerns, and much work has been done to define AIS technical and communication requirements. These efforts have resulted in worldwide mandatory carriage requirements for AIS aboard vessels that must comply with the International Convention for the Safety of Life at Sea (SOLAS) and in discussions about non-SOLAS vessel carriage requirements in the United States. However, despite these efforts, little has been said about shipboard display of AIS information, a topic addressed in this report. Because of the lack of standards and requirements for shipboard display of AIS information, the United States Coast Guard (USCG) requested that the National Research Council's (NRC's) Transportation Research Board (TRB)/Marine Board examine the technical and human factors aspects of shipboard display of AIS information. This effort was to include an assessment of the state of the art in AIS display technologies, an evaluation of current system designs and their capabilities, and a review of the relevant human factors aspects associated with operating these systems.