It is well-known fact that ocean-going vessels, especialy conventional type cargo boat, are not always fully loaded. But, this fact does not take into consideration for designing of wharves.
　This paper presents the case study of actual distribution of shipp's draft at port of Kobe. Followings are interesting characteristics made clear by this survey:
　i) 30% of berthing vessels are very small in size comparing to the so called design vessel of the wharves.
　ii) The ratio of actual draft to the draft of fully loaded condition lies between 0.8 and 0.75 for the vessels larger than 5,000 G/T.
　iii) Distribution of the abovementiond ratio to the same class (1,000 G/T steps) is very similar to the Normal distribution.