In 1990s the debate on very large ships made the mega ship and mega port concept emerge. Many studies have been done on such big ships by consultant, naval architects, port designers, ship operators, economists etc, with different points of view and results. However, an early study on the review of the literature identified some limitations and this study tries to overcome the shortage of the previous studies with particular emphasis on the evaluation of the sea port network for mega ships over 12,000TEUs.
For this the 'Far-east - Europe' liner route was selected for the empirical study in which 8 vessels of 5,000TEU are providing weekly service. For 12,000TEU vessel 4 sea port network alternatives were established on the same route based on the survey of 18 liner shipping companies. Finally, the 4 alternatives were evaluated with respect to the service time taken to provide weekly service and the number of vessel needed in comparison with those of 5,000TEU vessel. The major issues and directions for further studies were suggested as well.