Due to increasing demand of the port activity it requires rapid operations of ship assisting and tug. Complex operations combined with challenging environmental disturbance often lead to ship accident that caused damaged to the jetty or the ship itself that also disrupt the overall port operation. On of the cause that lead such accidents is the limited capability of the tugboat to handle manoeuvre in extreme environment condition. Beside the safety of the operation are threatened this is also one factor that lead to decreased in tug operation effectiveness. This study intent to analyse the potential of dynamic positioning (DP) system used in the tugboat. Port of Cilacap used as study case due to special requirement as well as challenging location that lead in extreme condition of port operation. Two type of propulsion are used which is Azimuth and Void-Schneider propulsion. The conceptual system design is analysed by perform modelling simulation in Matlab software. Several condition of operation among the type of propulsion are assessed. The result is that DP system on tugboat could reduce the potential uncontrolled movement of the ship that lead to the accident. The analysis also proved that DP system of the ship can increase effectiveness of the operations by reducing the response time during manoeuvring.
LPG plays important role in Indonesia as household fuel. With the rapid growth of LPG usage, its handling facility is built across the country. The handling of LPG requires various activity prior to supporting its supply chain. One of the vital facility is Terminal LPG (or on this case Terminal LPG Semarang) which serve as a hub in LPG distribution because it handles a relatively huge amount of LPG. It is exposed to operational risk especially fire risk. This paper is intended to assess the risk of LPG Terminal by using combined both qualitative and quantitative methods. The initial step is to identify the hazard by using HAZOP Study. The next step is to determine the likelihood of the risk by using FTA and ETA resulted in event frequency. The severity level is determined using consequences analysis which involved fire modeling of the intended scenarios. The result from both frequency and consequences will be presented in the risk matrix to determine the unacceptable risk scenario to develop a mitigation plan by using Fire Risk Card to assess the capability of the Terminal firefighting equipment.
Today, dual fuel diesel engine (DF-DE) on board ship is proven to produce smaller gas emission. The most common configuration for DF-DE is by using natural gases as main fuel but does not rule out the potential of other alternative fuel such as methanol. Methanol has potential application on board as low carbon, sulphur, NOX and particulate matter. Furthermore, it can produce with natural gas and biomass that has smaller emission from a life-cycle perspective. However, Methanol which classified as low flash point fuels (LFL), it has adverse effects including toxic, volatile and corrosive. This paper will specifically identify the potential hazard of methanol fuel system on board. Even though the further proposed design of Methanol fuel system is still not fully intact, the preliminary design is already developed and can be determined as a basis for hazard potency identification. The method for this identification is Hazard and Operability (HAZOP) which refers to BS IEC 61882:2001. With an expectation that the outcome from this identification can become the recommendation for further more detailed proposed a design for methanol fuel system.
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