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Analysis Of The Use HSD, MDO And B-30 On Passenger Ships 2000 GT Aldyn Clinton Partahi Oloan; Muswar Muslim; Ayom Buwono; Shahrin Febrian
International Journal of Marine Engineering Innovation and Research Vol. 9 No. 4 (2024)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v9i4.4894

Abstract

The ship being analyzed is a Ferry ro-ro 2000 GT sailing from Bali to Lombok via the Lombok Strait crossing route with a distance of 38 nautical miles. Identification of the use of diesel fuel for ship operations is important for ferry vessels, especially in connection with efforts to efficiently use of diesel fuel in ship operations. In solving problems, efficiency analysis is completed by applying technical analytical, correlational-predictive, and comparative methods. The technical analytical method is specifically used to calculate engine characteristics in fuel use, and the correlational-predictive method is used as an approach method to the phenomenon of the relationship between engine characteristics in the use of different fuels in ship operations, in contrast, the comparative method approach will be used to provide a detailed illustration. More complete in a case study of the use of diesel as fuel for the operational main engine of a ferry ship.
The Analysis of Thrust and Efficiency of B – Series Propeller : Influence of Speed Variation Aldyn Clinton Partahi Oloan; Muswar Muslim; Ayom Buwono
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 4 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i4.5098

Abstract

For variations in ship speed given data such as length perpendicular (LPP) 28 meters, propeller rotation (N) 290 rpm and shaft horse power (SHP) of 452.5 Hp by setting speed values varying from 4 knots to 9 knots, the average propeller efficiency for the B4-40 type is 60% while the average trust or thrust of the ship is 5873.5 kg and the average trust coefficient is 0.28. Likewise for the B4-55 type, the average propeller efficiency is around 58.6%, then the average thrust for the ship is 5736.3 kg and the thrust coefficient for the ship is 6.6.
Analysis of Sea Border Transportation in Indonesia, Case Study: Crossing Between Indonesia and Philippines (Bitung – Davao City) Danny Faturachman; Aldyn Clinton Partahi Oloan; Fridolini
International Journal of Marine Engineering Innovation and Research Vol. 6 No. 4 (2021)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v6i4.5676

Abstract

Indonesia as an archipelagic country consists of thousands of islands and has a large sea area so that the required mode of transportation is sea transportation as a means of mobility and driving national economic development. In addition, Indonesian waters serve as a liaison between cities, as well as between countries. As a border on the island of Sulawesi, the city of Bitung is a link between Indonesia and the city of Davao City in the Philippines. For all of this, security for shipping, especially at the border, is needed to support the smooth delivery of goods by using Ferry Ro/Ro ships so that sea transportation activities in general and trade and economic activities between the two countries can run smoothly because maritime safety greatly affects the continuation of development efforts.
Ergonomic Analysis of Welding Postures on Productivity and Weld Quality Using the REBA Method Mohammad Danil Arifin; Yoseph Arya Dewanto; Aldyn Clinton Partahi Oloan; Kalpika Arhan Nugraha
International Journal of Marine Engineering Innovation and Research Vol. 10 No. 3 (2025)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v10i3

Abstract

Ergonomics in the workplace plays a vital role in reducing the risk of musculoskeletal disorders, preventing accidents, and improving both work efficiency and productivity. In shipbuilding welding activities, workers are frequently exposed to awkward and static postures that lead to fatigue, stress, and long-term injuries, which may compromise weld quality and project performance. This study aims to analyze ergonomic risks across four welding postures i.e., downhand, vertical, horizontal, and overhead, using the Rapid Entire Body Assessment (REBA) and Nordic Body Map (NBM) methods. The REBA assessment indicated that downhand welding scored 10 (high risk), vertical welding 11 (very high risk), horizontal welding 8 (high risk), and overhead welding 9 (high risk). NBM results revealed that 77.5% of welders in vertical welding reported waist pain, 72.5% calf pain, and 70% back pain; horizontal welding showed 67.5% right-hand pain and 65% right-wrist pain; overhead welding resulted in 57.5% neck and waist pain; while downhand welding still caused 70% complaints in the back and calves. These findings confirm that welding ergonomics directly affect worker health, weld quality, and productivity. The study recommends ergonomic interventions such as scaffolding, adjustable supports, arm rests, and proper work rotation to minimize strain, enhance safety, and ensure efficiency in shipyard operations.
Analysis of Causes and Impacts of Tug and Barge Vessel Accidents Using the Analytic Hierarchy Process: A Case Study of XYZ Company Danil Arifin, Mohammad; Mohammad Fajar Sodiq; Aldyn Clinton Partahi Oloan; Y. Arya Dewanto; Fanny Octaviani
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 1 (2026): In Progress
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i1

Abstract

Indonesia’s maritime sector plays a strategic role in national logistics, where tug and barge vessels are widely used to transport bulk commodities due to their cost efficiency and operational flexibility. However, tug and barge operations face a high risk of accidents, particularly in densely trafficked waterways and challenging environmental conditions. This study aims to analyze the causes and impacts of tug and barge vessel accidents at Company XYZ during the period 2015–2024 and to determine priority mitigation measures using the Analytic Hierarchy Process (AHP). The study analyzes 170 recorded accident cases classified into human, technical, environmental, and procedural factors. The results show that human factors are the dominant cause, contributing 55.8% of accidents, followed by technical factors (26.3%), environmental factors (12.2%), and procedural factors (5.7%). The accidents resulted in material losses, operational delays of 3–7 days per incident, and environmental impacts such as fuel spills and onboard fires. The AHP results indicate that human-related factors are the highest priority for mitigation, followed by technical, environmental, and procedural factors, with a consistency ratio of 0.043, indicating acceptable reliability. This study provides a structured decision-making approach to support safety improvement and risk mitigation in tug and barge vessel operations.
Structural Integrity and Edge Stiffness Evaluation of GFRP Modular Towing Tank: Analytical and Numerical Study: Analytical and Numerical Study AR-RABAQI, MUHAMMAD A'ZOM; Muswar Muslim; Ayom Buwono; Moch Ricky Dariansyah; Mohammad Danil Arifin; ALDYN CLINTON PARTAHI OLOAN; Sulaksana Permana
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 1 (2026): In Progress
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i1

Abstract

Conventional hydrodynamic testing facilities require substantial capital investment, limiting maritime research accessibility in developing nations. This study addresses the structural integrity and global stiffness challenges in designing a modular Glass Fiber Reinforced Polymer (GFRP) composite towing tank as a cost-effective alternative. A hybrid laminate configuration combining Chopped Strand Mat 450 g/m² and Woven Roving 800 g/m² was analyzed under hydrostatic loading using Classical Laminate Theory (CLT) and Finite Element Method (FEM). Analytical predictions indicated acceptable performance with 26.09 MPa bending stress and 5.95 mm deflection under fully clamped boundary assumptions. However, full-scale FEM simulation revealed critical free-edge effects, producing 41 MPa Von Mises stress and 62 mm deflection at the tank rim exceeding the L/200 serviceability limit despite maintaining a safety factor of 3.65. This study demonstrates that while the 19 mm wall thickness satisfies strength requirements per ASME RTP-1 standards, edge stiffening through horizontal rim reinforcement is essential to control excessive deformation in open-top modular configurations.