Journal of Navigation and Port Research 2002;26(4):383-390.
Published online October 31, 2002.
우리나라 항만에서의 체선ㆍ체화 시간비용 재추정
장영태, 성숙경
Revisit to Estimate the Time Cost of Ships and Cargoes
Young-Tae cChang, Souk-Kyung Sung
The time cost of ship and cargoes is one of the most important data for decision-making of port investment and operational efficiency. Studies in this area were initiated internationally by Goss and Mann in late 70’s and also done in Korea 10 years ago using the same methodology as Goss. the main purpose of this paper is to revisit to estimate the time cost using updated data. The estimation was undertaken sampling data on various investment and operating costs by vessel from 205 vessels, comprising 47.5% of the national fleet in Korea as well as on cargoes from international trade statistics. Compared with the study of 10 years ago, major finding of this research is that time costs of liquid and dry bulk carriers have increased, in case of the former type, showing almost doubled cost increase. The increase is deemed to be caused by very expensive LNG carriers. Lowered social discount rate in this study compared with 10 years ago, in general, has caused the costs to stay at similar level to the previous study. Sensitivity tests were conducted using various social discount rates.
Key Words: congestion cost
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