Modelling of Ship Collision Frequency in The Strait of Malacca and Singapore (SOMS) Influenced by Indonesian Port Development

: The Strait of Malacca and Singapore (SOMS) is one of the busiest shipping channel lies between sea water territory of Indonesia, Singapore and Malaysia. The strait becomes a very important part of world freight transportation since it connects the shipping lane between East Asia, West Asia, Australia and Europe. Even though Traffic Separation Scheme (TSS) has been applied in the area to prevent the unlikely event of vessel collision, the number of catastrophic ship accident tends to increase by year. The Indonesian government plans to develop the ports located around SOMS. Such development increases the number of ships call per year which causes the ship traffic density in SOMS becomes more crowdy. This paper conducts an analysis on the vessel collision frequency influenced by the Indonesian ports development around waterway of SOMS including ports in Tanjung Pinang, Dumai and Batam Island. IALA Waterways Risk Assessment Program (IWRAP) is utilized to determine the annual frequency of head-on collision, overtaking collision and crossing collision. The Result of IWRAP modeling in this study shows that there is a significant increase of the future total ship collision frequency. The crossing collision contribute the most for the annual vessel collision, since there are higher number of ships cross the TSS caused by the development of Indonesian port around SOMS.