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IJOCE (International Journal of Offshore and Coastal Engineering)
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : -     EISSN : 25800914     DOI : -
Core Subject : Engineering,
Engineering
IJOCE, International Journal of Offshore and Coastal Engineering, is an academic journal on the issues related to offshore, coastal and ship science, engineering and technology. Published quarterly in February, May, August, and November.
Arjuna Subject : -
Articles 9 Documents
 1 
Search results for , issue "Vol 7, No 1 (2023)" : 9 Documents clear
Design Unmanned Minesweeper Catamaran as a Tool to Make a Safer Marine Environmental Using Analytical Methods Cahya Kusuma; Radityo Dimas Mulyono; Wawan Kusdiana; Muhammad Syaifi; Mahendra indiaryanto
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15527

Abstract

After the war is over, the sea mine layer must be neutralized because if the mine explodes, it will cause environmental damage and the death of marine life. Minefields with very shallow water are difficult to clear using a minehunter. Mining in shallow sediment-covered areas is still hazardous, especially if the area is bridges, shore dredging, ports, or shipping lanes. This study designed the hull of the Unmanned Mines Sweeper (UMS) Catamaran, which towing side scan sonar so that it could double function as a mine-like detection and a survey vessel for seabed environmental conditions in very shallow areas. UMS design with analysis method using Maxsurf Modeler Advanced V21.13 software. Line plan design and general settings using AutoCAD software with data obtained from models designed using Maxsurf software. Total resistance value using Maxsurf Resistance Advanced V21.13 software. UMS uses a Catamaran design with an LoA of 4.823 meters, LwL of 4.177 m, and a width of 2.24 m. The ship has a high draft of 0.498 with a displacement of 1.557 tons. The results of the resistance analysis obtained Rt of 404.94 N. The drive system uses an electric motor that can provide endurance for 6 hours.
Experience in Oceanographic Surveys for Designing 100 kW Tidal Current Energy Conversion Systems Mukhtasor Mukhtasor; Rasgianti Rasgianti; S Junianto; S Lestari; S Rahmawati; Erwandi Erwandi; H Ikhwani; W A Pratikto; A D Nugraha; A A Simaremare; Ruly Ruly
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.16913

Abstract

Nowadays tidal current energy conversion system (TCECS) is being developed with a capacity of 100 kW for Indonesian waters. The design process is based on the results of field measurements, i.e., ocean currents, tides, ocean waves, and bathymetry. This paper aims to explain the experiences when collecting oceanography data in a potential site for TCECS. The survey method is that the equipment placed on the seabed will emit signals that can record flow and wave data according to the desired time and depth. The survey process, especially for the tidal current energy application, requires good preparation so as not to fail. The results of this paper explain the challenges and highlight the steps. These are technical, environmental, and survey permits. The technical aspects are tool stability, buoyancy effects, visualization tools with an underwater camera system, seawater brightness, and sedimentation. Environmental aspects are big waves, strong currents, and weather. The survey permit aspects are destruction and conservation area. Therefore, before the survey, safety procedures or documents must be made in the form of HIRA (Hazard Identification and Risk Analysis). The experiences of this survey are a novelty consideration for other surveyors in the tidal current energy aspect.
Risk Analysis of Dual Fuel Tug Ship Design in Maritime Technology Development Innovation Program – BRIN Dewi Kartikasari; Muhajirin Muhajirin; Waluyo Waluyo; Siti Sadiah; Dany H P
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15528

Abstract

The problem that often occurs in the ship design process is the deviations in time and quality of results. IMO [1] regulations provide a methodology that ship design should be carried out with a risk-based probabilistic approach. This paper aims to become a source of reference information for ship design innovations in supporting efforts to increase performance optimization and efficiency. In the dual fuel tugboat design carried out in the BRIN Maritime Technology Development Innovation Program with funding from the government, the risk analysis begins with identifying and collecting data on control systems and internal controls based on existing risks, data collection on regulations, operational procedures, ship design business processes, and measuring the probability of risk occurrence. Furthermore, the level of risk is ensured by looking at the risk analysis matrix and making a risk map. The results of the analysis show that there are 3 risk events with a high-risk status that can lead to reduced quality and delays in the completion of the tugboat design, which is a skill base, experience, and the ship model test schedule.
Preliminary Study of an Integrated Calculation of Ship Strength on Tankers with Applicable Regulations Ardi Nugroho Yulianto; Erzad Iskandar Putra; Yuda Apri Hermawan; Teguh Putranto; Gita Marina Ahadyanti; Septia Hardy Sujiatanti; Danu Utama; Nurhadi Siswantoro; Irfan Zidni; Herry Sufyan Hadi
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15529

Abstract

Recently, the development of the digital era has increased significantly. Industry 4.0 began to be discussed and applied in the early 21st century. Cyber-Physical systems are becoming a trend in current technological developments. Several technologies in Industry 4.0 are being applied, such as the internet of things, cloud computing, automated simulation, intelligent robots, big data analysis, augmented reality, and additive manufacturing. The shipyard industry is one industry that must be able to adapt to keep up with technological developments. In the ship's preliminary design stage, the strength calculation process that refers to certain regulations has an important role in the design process. The integrated calculation system will make working easier for a naval architect. This paper aims to conduct an initial study in calculating ship strength integrated in real-time with the regulations that govern it. This study produces an idea to integrate the calculation of ship strength with regulations from a class society that continues to grow. The research is expected to provide further development to assist in the preliminary design process that provides efficiency and more accurate monitoring of results.
Design Stealth Fast Attack Vehicle (SFAV) 18 Meters Using Numerical Method as Coastal Patrol Vessels Cahya Kusuma; Wawan Kusdiana; Muhammad Syaifi; Wika Adhietama Sumarsono
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15525

Abstract

The design of the 18 Meter Stealth Fast Attack Vehicle (SFAV) with Maxsurf software and the Savitsky method as a coastal patrol vessel is a fast ship that has stealth capabilities that can be used as a coastal patrol vessel area 12 NM to supervise fishing vessels so that fishing and marine resources do not damage the environment such as the use of tiger trawls and marine bombs. The ship model resistance and stability are analyzed using the numerical software Maxsurf Modeller Advanced V8i. Lines plan and general arrangement using AutoCAD software. Model analysis, the design of the SFAV Interceptor Vehicle uses the spiral design method, while the prediction of the resistance value uses the Savitsky preplanning and planning methods. Ship stability uses standardized values issued by IMO, which can be applied to the Maxsurf Stability Advanced V8i software. The analysis results of resistance prediction software and numerical successively 43.416 kN, 45.526 kN, with a difference of 4.6%. The stability analysis is predicted using heel angle model analysis on Maxsurf stability software in various conditions. The results meet IMO standards and capable of sea stage 4. The existence of SFAV ships will help security patrols to protect the coastal area.
A Modest Numerical Simulation for Automatic Ship Collision Avoidance System to Support Green and Autonomous Shipping Concept Yuda Apri Hermawan; Fernanda Wahyu Pratama; Totok Yulianto; Dedi Budi Purwanto
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15530

Abstract

The development of autonomous ship is being pursued massively and significantly, either industrially, regulatory, or academic. The autonomous ship is considered to be able to significantly reduce challenges caused by unexpected errors of manual navigation (manned ship). One of the challenges for autonomous ship development is constructing an automatic ship collision avoidance system as a basic system for identifying and avoiding an obstacle object around the ship. The collision avoidance system must consider not only the position of the ship and the obstacle but also the maneuvering characteristic (ship dynamics) and control system of the ship, thereby making its numerical system more complex. This research presents a modest numerical simulation for designing an automatic ship collision avoidance system. However, the numerical model still considers the main necessary elements of the system. The numerical model includes a set of automatic guidance system, collision avoidance system, ship dynamics, and control system. Head on head, overtaking, and crossing collision scenarios are performed to investigate the numerical model. The simulation results show that the modest numerical simulation can be used to perform an automatic ship collision avoidance system in which the ship can automatically avoid a target ship considered as the ship’s obstacle in those three collision scenarios.
Gap Analysis of Ship Design Approval Case Study: Key Plan Drawing Assessment for Dual Fuel Harbour Tugboat Iskendar Iskendar; Abdul Kadir; Waluyo Waluyo; Dewi Kartikasari; Siti Sadiah; Dany Hendrik Priatno; Andi Cahyo Prasetyo Tri Nugroho; Fredhi Agung Prasetyo
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.15526

Abstract

Starting to build the ship, the ship’s designer or builder must prepare key plan drawings with an approval statement that comes from the Classification Society (CS) based on the conformity of key plan drawings to comply with the rules or sometimes do not comply with those rules in several cases, so this situation could be minimized by using a gap analysis technique prior to the approval of the ship design process. Gap analysis is the tool to evaluate whether the design has been conforming to comply with the rules of the classification society or not. This paper chooses some parts of the ship design of a Dual Fuel Harbour Tugboat (DF Tug) to show the level of conformity to the rules. The assessment process involves Biro Klasifikasi Indonesia (BKI) since the DF Tug will be classified by BKI as a competent national classification society. The findings gap is used to improve the design of DF Tug. Finally, the framework of corrections and improvements to the DF Tug design is proposed as part of the refinement of key plan drawings, and the final ship design complies with rules and gets full approval from the classification society
Design Optimization on Seawater Distillation System That Utilizes Exhaust Gas On 300 Gt Fishing Vessel S A A Sunya; A Santoso; M B Zaman
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.16912

Abstract

In the shipbuilding process, planning and calculations are needed, including the planning of the existing systems on the ship, one of which is the freshwater supply system. In planning the freshwater supply system, it is necessary to calculate the fresh water tank, which depends on several parameters such as; length of sailing time, number of ship passengers, and others. There are two options to supply the large freshwater needs, either providing a large tank capacity or a freshwater production system (seawater treatment). However, providing a large space for freshwater tanks will reduce the payload of the ship. Most of the generators' diesel engine combustion can be used to maximize the heat energy wasted through the generators’ diesel engine exhaust gases. The solution that will be pursued is the distillation of seawater into freshwater by utilizing the heat energy of engine exhaust gases, which so far have not been optimally utilized on fishing vessels. In this project, we will discuss the use of exhaust gas for the design optimization of a seawater distillation system that utilizes exhaust gas on a 300 GT fishing vessel.
VOl 7 Satya Dewi Author
International Journal of Offshore and Coastal Engineering (IJOCE) Vol 7, No 1 (2023)
Publisher : Pusat Publikasi Ilmiah Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25800914.v7i1.19186

Abstract

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