The jetty, discussed in this report, has to be adapted to meet new demands. The jetty is owned and operated by P.T. Krakatau Steel (P.T.K.S.). It is used for transferring iron ore. P.T.K.S. intends to increase the steel production in the coming years and therefore wants to upgrade a certain part of the jetty. The jetty exists of three smaller jetties, with an average length of 285 metres, which are in line with each other. The two oldest jetties were built between 1974 and 1975 and are designed for vessels up to 50,000 D.W.T.. The jetty built most recently was built between 1990 and 1992 and is originally designed for vessels up to 70,000 D.W.T. The latter jetty has to be modified to accommodate vessels up to 150,000 D.W.T.. The jetty is situated on the Northwest coast of the Indonesian island of Java, about 8 kilometres South-Southwest of Merak along the Sunda Strait.The jetty which now accommodates ore carriers up to 70,000 D.W.T. should in the near future accommodate ore carriers up to 150,000 D.W.T.. This makes demands upon the jetty which cannot be met. The problem is to meet the new demands with as few and as simple adjustments as possible.