Korosi adalah salah satu penyebab kerusakan yang umum terjadi pada mooring buoy akibat adanya oksidasi pada permukaan pelat baja. Tujuan dari penelitian ini adalah untuk mengetahui kebutuhan dan peletakan proteksi katodik serta biaya yang dibutuhkan dalam pengadaan proteksi katodik pada mooring buoy dengan menggunakan aturan BKI (Biro Klasifikasi Indonesia) dan DNV (Det Norske Veritas Industry Norway). Dalam sistem proteksi katodik terdapat dua metode proteksi katodik yaitu Sacrificial Anode Cathodic Protection (Anoda Korban) dan Impressed Current Cathodic Protection (ICCP). Pada penelitian ini digunakan metode anoda korban karena instalasi lebih sederhana sehingga tidak memerlukan keahlian khusus dan penghubung anoda telah terlindungi secara katodik. Mooring buoy dengan tinggi 2,380 m, berdiameter 3,200 meter dengan umur desain proteksi katodik yaitu 5 tahun. Anoda yang digunakan pada penelitian ini adalah anoda dengan tipe Longated flush-mounted Z9.0H1 (Welded Type) dengan dimensi 355 x 85 x 45 mm. Dari hasil penelitian ini  didapatkan total massa anoda yang dibutuhkan untuk memproteksi mooring buoy adalah 48 kg dengan jarak pemasangan antar anoda pada pelat lambung topside adalah 2,000 m dan pada pelat bottom swim lambung adalah 3,000 m serta estimasi biaya yang dibutuhkan dalam pengadaan proteksi katodik mooring buoy adalah Rp. 7.487.075.

This paper discusses the influence of asymmetrically damaged ships on the ultimate hull girder strength. When such damages take place at the asymmetric location of cross sections, not only translation but also inclination of instantaneous neutral axis takes place during the process of the progressive collapse. To investigate this effect, the Finite Element Analysis (FEA) is employed and the damage is assumed in the middle hold. The collision damage is modeled by removing the plate and stiffener elements at the damage region assuming the complete loss of the capacity at the damage part.

Mode of transport waterway river tallo Makasar has been operated since long transports passengers, luggage and a motor vehicle, and the only access mode for the island lakkang people through tallo to kera-kera, the eastern and the southern of Makassar city. In the operation of waterway mode, the owner ignored the shipping safety of waterway. It was proven that there is not any other safety devices above the waterway mode. Shipping safety device is an absolutely thing must be required for sea transportation, rivers and lakes. Hence it is necessary to disseminate the importance of shipping safety device for the owner of the river tallo makassar to increase the quality of service of shipping safety for passengers mode independently in accordance with national and international regulations. The safety of the device is based on land transport minister regulation no. PM 25 years 2015, transportion safety standards on the river lakes and crossing. Disseminate gives users of security and safety and public service quality shipping safety for passengers in the river tallo makassar when sailing and the process of loading and unloading of passengers and a motor vehicle.

The double bottom can enhance the ship's safety and a ballast tank. If the ship crashes into a rock and the outer bottom plate is torn, the watertight top tank will limit/protect the cargo from damage caused by water. The tank is a cargo storage container and is the central part of the liquid and gas transport vessel so that the cargo is maintained and safe. As a storage medium, the tank will always get a load from inside or outside the tank—calculating tank requirements using Simpson's approach. From the calculation results obtained fuel tank obtained 68,354 m3, and the diesel oil tank obtained 14,758 m3. The lubricating oil tank obtained 17,566 m3. The freshwater tank obtained 72,815 m3, and the Ballast tank obtained 356,098 m3.

Ship motion is the ability of a ship to survive at sea under any conditions. Therefore this capability is an essential aspect in terms of ship design. The shape of the hull dramatically influences the characteristics of the movement and operability of the ship itself. Vessel operability is the time at sea when the structure can still operate according to the established criteria and its correlation to the wave height where the requirements will be exceeded. In this study, an analysis of 3 degrees of freedom of translational movement and rotation of heave roll and pitch was carried out on the planing hull type fast boat model at regular waves with the parameters of body mass, gyration radius, damping, and others presented in the form of a Response Amplitude Operator (RAO) graphic image.