The fact that Korea is surrounded by water has contributed to the development of its international trade. This has led to an increase of maritime traffic in ports and their associated narrow waters, which will affect port and maritime navigational safety. Evidence shows that among 882 marine accidents occurred from 2002 to 2008 in Korean waters, approximately one-fifth occurred in ports (Korea Coast Guard, 2008). It is therefore urgent to identify the factors influencing port safety and evaluate the navigational safety levels of Korean ports.