Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Focus and Scope Research titles encompassed by this journal include, but are not limited to: Naval Architecture: covering ship strength, Ship Hydrodynamics, Ship Construction, Ship Production Management, Wooden and FRP Ship Materials, Ship Design Innovation, Ship Vibration and Noise, Welding Technology, Fatigue, Sea Transportation, Computational Fluid Dynamic Modeling. Marine Engineering: encompassing Engine Performance, Renewable Fuels, Dual fuel system, Ship electricity, Ship Resistance, Ship piping systems, Ship reliability). Ocean engineering: Marine and Offshore Structures, Coastal Structures and Management, Port Structures and Management, Subsea Umbilicals, Risers and Flowlines (SURF), Ocean Renewable Energy, Marine Instrumentation, Marine Pollution. Mechanical engineering: addressing Tribology, Energy Studies, Engines and Turbines, Heat Transfer, Fluid Mechanics, Lubrication and Wear, Materials Science, Mechatronics, Refrigeration and air conditioning, Pressure analysis, Structural and mechanical design, Renewable energy, Structural mechanics, Thermodynamics, Materials processing, Vibration).
Articles
52 Documents
<![CDATA[Enhancing From Healthy Eating to Green Energy: A Dual Approach to Student Education on Nutrition and Biodiesel (Renewable Energy) ]]>
<![CDATA[Suardi, Suardi]]>;
<![CDATA[Pawara, Muhammad Uswah]]>;
<![CDATA[Alamsyah, Alamsyah]]>;
<![CDATA[Nurcholik, Samsu Dlukha]]>;
<![CDATA[Wulandari, Amalia Ika]]>;
<![CDATA[Anggela, Anggela]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v3i2.8481808
<![CDATA[Adolescence represents a critical stage of physical and cognitive development, requiring balanced nutrition to support growth, concentration, and academic performance. However, many students still lack awareness of healthy dietary practices and continue to consume nutrient-poor foods, leading to increased risks of metabolic and cognitive disorders. To address this issue, a dual-focus educational program was implemented at SMA Negeri 6 Penajam Paser Utara, combining balanced nutrition education with the introduction of simple renewable energy technology through biodiesel production from waste cooking oil. The program, conducted in collaboration with the Kalimantan Institute of Technology (ITK), employed interactive lectures, demonstrations, and hands-on sessions to enhance student understanding. A pre-test and post-test evaluation involving 40 students demonstrated a substantial improvement in knowledge, increasing from 45% to 96% after the intervention. Participants also expressed strong positive responses to the integration of nutritional awareness and eco-friendly technology, recognizing its relevance to daily life and environmental sustainability. The results show that this dual educational approach effectively strengthens students’ understanding of healthy eating habits while promoting environmental responsibility through waste-to-energy concepts. Overall, the program highlights the potential of combining nutrition education and renewable energy literacy as a strategic model for school-based community outreach aimed at fostering healthier, more environmentally conscious future generations.]]>
<![CDATA[The Effect of Hard Chine Planing Variations on Resistance and Stability of a Patrol Boat Hull ]]>
<![CDATA[Dani, Fildan Lujainid]]>;
<![CDATA[Raharja, Achmad Mukti]]>;
<![CDATA[Sihombing, Herawaty Magdalena]]>;
<![CDATA[Abadi, Galang Wahyu]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v3i2.8481802
<![CDATA[Patrol boat play a crucial role in maritime security and law enforcement, where optimizing hull performance is essential to achieve both efficiency and stability in various sea states. This study analyzes the influence of hard chine variations on the resistance and stability of a patrol boat hull. Four hull models single and double chine with angles of 0° and 10° were evaluated using Maxsurf Resistance and Stability. Total resistance was calculated at service speeds of 10 and 15 knots, while stability was assessed based on IMO Resolution A.749(18), Chapter 3. Results show that at 10 knots, the single chine 10° model produced the lowest resistance, whereas at 15 knots, the double chine 10° gave the best performance. Stability analysis indicated that all models met IMO criteria, with the double chine 10° achieving the highest GMt, maximum GZ, and angle of maximum GZ. The findings suggest that the single chine 10° is more efficient for calm-water operations, while the double chine 10° provides superior stability for rough-sea conditions]]>
<![CDATA[Technical and Operational Analysis of Marine Airbag-Assisted Ship Docking ]]>
<![CDATA[Puspa Ningrum, Ainun Chandra]]>;
<![CDATA[Yusril Syam, Muh]]>;
<![CDATA[Maulidah, Hikmah]]>;
<![CDATA[Wahidah, Jusma]]>;
<![CDATA[Jeremy Verian Sitorus, Chris]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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<![CDATA[Ship docking operations require careful planning and precise implementation to ensure safety and operational efficiency. One widely applied method in shipyard practice is the use of marine airbags to support vessels during docking and undocking processes. This study analyzes the application of a marine airbag-assisted docking system for the barge BG. Liana at PT. Jhonlin Marine Trans using an analytical and field-based approach. The analysis focuses on determining the required number of airbags, evaluating load distribution, and identifying factors contributing to airbag failure during docking operations. Vessel principal dimensions and marine airbag specifications were used as primary input parameters, while field observations were conducted to assess actual operational conditions. The results indicate that a minimum of 21 marine airbags is required to ensure adequate load sharing and structural safety; however, only seven airbags were deployed in practice, leading to excessive load concentration and increased risk of airbag failure. The failure analysis demonstrates that the observed damage was predominantly caused by controllable operational factors, including inadequate airbag quantity, improper placement, pressure inconsistencies, and runway conditions. These findings highlight the importance of strict compliance with analytical planning and operational procedures to enhance safety and reliability in marine airbag-assisted docking operations.]]>
<![CDATA[Strategic Human Capital Development for Maritime Infrastructure through Enhanced CAD Competency in Vocational Education ]]>
<![CDATA[Pratama, Fernanda Wahyu]]>;
<![CDATA[Wulandari, Amalia Ika]]>;
<![CDATA[Syam, Muhammad Anjas]]>;
<![CDATA[Wahidah, Jusma]]>;
<![CDATA[Agusty, Cindy Lionita]]>;
<![CDATA[Syahab , Husein]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v3i2.8481886
<![CDATA[The Indonesian maritime industry faces a critical human capital paradox, where a surplus of vocational graduates exists alongside persistent difficulty among shipyards in recruiting personnel capable of executing modern Product-Oriented Work Breakdown Structure and digital drafting workflows. This study investigates this disconnect through the pilot implementation of an Applied CAD for Maritime Engineering curriculum at a partner vocational high school, SMKN 5. Using a Guided Replication methodology, the intervention bridged the gap between theoretical software knowledge and industrial application by emphasizing parametric modeling and design-for-production logic. The results show that student aptitude is high, as evidenced by the rapid acquisition of three-dimensional modeling skills, while the national vocational infrastructure remains critically unprepared. The study identified a significant technological readiness gap in which existing school hardware was unable to support industry-standard software, requiring external technical intervention. These findings indicate that closing the maritime skills gap requires more than curriculum reform alone, but also necessitates fundamental improvements in school computing infrastructure and a pedagogical shift from software-centric instruction toward production-centric learning. This research proposes a scalable framework for integrating industrial competencies into vocational education to support the long-term development of Indonesia’s maritime workforce.]]>
<![CDATA[Assessment of Coconut Petiole Fiber–Reinforced Hybrid Composites as Sustainable Materials for Ship Components ]]>
<![CDATA[Pawara, Muhammad Uswah]]>;
<![CDATA[Alamsyah, Alamsyah]]>;
<![CDATA[Arifuddin, Andi Mursid Nugraha]]>;
<![CDATA[Ikhwani, Rodlian Jamal]]>;
<![CDATA[Syam, Muhammad Anjas]]>;
<![CDATA[Pratama, Fernanda Wahyu]]>;
<![CDATA[Mas`ud M, Ahmad Azwar]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v3i2.8481890
<![CDATA[The use of synthetic fibers in composite materials in the shipping industry provides mechanical advantages but produces non-biodegradable waste. This encourages the development of more environmentally friendly natural fiber-reinforced composite materials. This study examines the physical properties and tensile strength of composites made from a mixture of coconut petiole fibers and fiberglass, including the effect of immersion in seawater and freshwater for 30 days. The results show that the composites experience an average water absorption of 0.074% (freshwater) and 0.065% (seawater). Tensile tests show average tensile strength values of 35.837 MPa (freshwater), 31.890 MPa (seawater), and 41.290 MPa (without immersion). Immersion in an aqueous medium reduces the tensile strength due to interfacial degradation between the fiber and the matrix. Coconut petiole fiber–fiberglass composites have the potential to be an alternative material for ship components with competitive and environmentally friendly mechanical characteristics]]>
<![CDATA[Conceptual and Preliminary Design Innovation of a Multipurpose Palm Fruit Vessel for Inland Plantation Waterways in Muara Kaman ]]>
<![CDATA[Suardi, Suardi]]>;
<![CDATA[Jamal, Jamal]]>;
<![CDATA[Irmandana, Arwis]]>;
<![CDATA[Alamsyah, Alamsyah]]>;
<![CDATA[Setiawan, Wira]]>;
<![CDATA[Jeremy Verian Sitorus, Chris]]>;
<![CDATA[Wahidah, Jusma]]>;
<![CDATA[Lionita Agusty, Cindy]]>;
<![CDATA[Mahmuddin, Faisal]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v4i1.8481848
<![CDATA[Oil palm fruit production in East Kalimantan continues to increase in line with high market demand. This situation demands efficient transportation facilities to transport the harvest from plantation areas. Furthermore, annual forest fires, particularly in peatland areas, are often difficult to manage due to limited land access. Based on these two challenges, this study proposes the design of a multipurpose vessel capable of both transporting oil palm fruit and supporting firefighting. The vessel is designed with main dimensions of L = 20 m, B = 4.9 m, H = 2 m, T = 1.5 m, and an operating speed of 8 knots. The cargo hold has a carrying capacity of 67.3 tons with a single trip distance of 12.3 km. The main innovation developed is a conveyor belt with hydraulic arms to increase the efficiency of the oil palm fruit loading and unloading process in the plantation area. Furthermore, the vessel is equipped with an external firefighting system with a capacity of 90 m³/hour with a horizontal spray range of 30 meters and a vertical height of 20 meters. The fire monitor operates using 7 kW of power to generate sufficient pressure to extinguish fires in areas difficult to reach from the riverbank. This multipurpose vessel is designed to provide an integrated solution for the oil palm plantation logistics chain while improving the response to forest fires in the Muara Kaman District.]]>
<![CDATA[Evaluation of Longitudinal Strength of a Cargo Barge Based on Shear Force and Still Water Bending Moment under Various Loading Conditions: Evaluation of Longitudinal Strength of a Cargo Barge Based on Shear Force and Still Water Bending Moment under Various Loading Conditions ]]>
<![CDATA[Santoso, Budhi]]>;
<![CDATA[Romadhoni, Romadhoni]]>;
<![CDATA[Jamal, Jamal]]>;
<![CDATA[Nusyirwan, Deny]]>;
<![CDATA[Abdurrahman, Naufal]]>;
<![CDATA[Ariany, Zulfaidah]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v4i1.8481958
<![CDATA[ABSTRACT – Longitudinal strength is a fundamental aspect of barge structural safety because variations in loading magnitude and load position may significantly affect the global hull girder response. This study aims to evaluate the longitudinal strength of a cargo barge based on shear force and still water bending moment under various loading conditions. The object of the study is a cargo barge with principal dimensions of 330 ft × 90 ft × 21 ft and a lightship weight of 1802.9 tons. The analysis was carried out using a still-water longitudinal strength approach based on the distribution of weight and buoyancy along the vessel length. Six loading conditions were investigated, namely lightship, fully loaded, partially loaded at 50%, and three crane-shift positions at the aft, midship, and fore sections. The net load distribution was obtained from the difference between distributed weight and buoyancy, and then integrated to determine the shear force and still water bending moment along the hull. The results show that the fully loaded condition produced the most critical structural response, with a maximum shear force of 0.385 × 10³ ton at Frame 50 and a maximum still water bending moment of -6.212 × 10³ ton·m at Frame 35. In contrast, the lightship condition generated the lowest internal force response. All evaluated loading conditions remained below the permissible shear force and still water bending moment limits, indicating that the barge satisfies the applicable longitudinal strength requirements. The study concludes that the vessel is structurally acceptable under all investigated loading scenarios, with the fully loaded condition representing the governing case for safe operation and load planning.]]>
<![CDATA[Assessment of Wave Characteristics in National Water Borders for Tactical Vessel Analysis and Maritime Security ]]>
<![CDATA[Rahmat, Muhammad Farhan]]>;
<![CDATA[Syahab, Husein]]>;
<![CDATA[Wulandari, Amalia Ika]]>;
<![CDATA[Kusuma, Cahya]]>;
<![CDATA[Indiaryanto, Mahendra]]>;
<![CDATA[Syam, Muhammad Anjas]]>;
<![CDATA[Pratama, Fernanda Wahyu]]>;
<![CDATA[Noor, Firman]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v4i1.8481963
<![CDATA[This study addresses the challenge of accurately representing wave conditions in Indonesian waters for ship design, where conventional standards based on North Atlantic extremes may lead to over-conservative designs. The objective is to evaluate seasonal wave characteristics in four representative regions—North Natuna Sea, Ambalat Block, Timor Sea, and Arafura Sea—and assess their implications for ship operational reliability. Hourly wind and wave data for 2025 were obtained from ERA5 reanalysis, while bathymetric information was sourced from BATNAS. Analyses included directional distribution (wind and wave rose), temporal variability of significant wave height (Hsig) and peak period (Tp), wave energy estimation using linear wave theory, and comparison between empirical data and analytical probability models via a Weibull distribution. Results show that the North Natuna Sea experiences the highest wave loading (Hsig up to 4.450 m; energy 13.316 kW/m) due to long fetch and bathymetric shoaling. Ambalat Block exhibits minimal wave energy (0.850 kW/m) despite deep waters, indicating fetch-limited growth. Timor Sea presents moderate Hsig (1.5–2.3 m) with long wave periods (>20 s) driven by swell, while Arafura Sea shows high Hsig (2.663 m) and energy (5.526 kW/m), though shallow-water effects limit wave growth and increase wave steepness. These findings demonstrate that wave loading is controlled not only by height, but also by period and bathymetric transformation. Incorporating site-specific and seasonal wave characteristics is essential for realistic and efficient ship design and operational assessment.]]>
<![CDATA[Polbeng Research Vessel Comfort Study in the Malacca Strait ]]>
<![CDATA[jamal, jamal]]>;
<![CDATA[Hafiz, Muhammad Alimul]]>;
<![CDATA[Santoso, Budhi]]>;
<![CDATA[Adietya, Berlian Arswendo]]>;
<![CDATA[Suardi]]>;
<![CDATA[Juanda]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v4i1.8481970
<![CDATA[The Polbeng Research Vessel is a small research ship developed by Politeknik Negeri Bengkalis (Polbeng) in collaboration with CV. Fatih Bahari Engineering. The vessel is constructed from High Density Polyethylene (HDPE) and has principal dimensions of 9 m length overall (LOA), 2.2 m breadth, and 1.2 m depth, powered by an 85 HP outboard engine. This study aims to evaluate the seakeeping and motion comfort performance of the vessel to support research activities involving personnel and onboard equipment. The seakeeping analysis is conducted using a frequency-domain approach based on Response Amplitude Operators (RAOs), where ship motions are evaluated under regular wave conditions. Four operational cases are considered, involving two wave heights (0.2 m and 0.4 m) and two wave encounter directions, namely beam seas (90°) and head seas (180°). Three ship motions are analyzed: heave, roll, and pitch. The results indicate that roll motion in beam seas conditions exhibits the most significant response compared to other motions, which is consistent with the theoretical characteristics of small vessels having shorter restoring arms for roll motion. Overall, the vessel’s motion responses remain within acceptable limits and satisfy established comfort criteria based on NORDFORSK 1987, STANAG 4154, U.S. Coast Guard (USCG), ISO 2631/1, ISO 2631/3, and BS 6841:1987 standards. The findings provide technical insight into the seakeeping behavior and comfort performance of HDPE-based small research vessels and serve as a reference for the design, evaluation, and development of environmentally friendly research and working vessels to enhance operational safety and effectiveness.]]>
<![CDATA[Structural Performance Analysis of HDPE and ABS Formwork Designs Using Finite Element Analysis ]]>
<![CDATA[zulkarnaen, zulkarnaen]]>;
<![CDATA[Laksana Guntur, Harus]]>;
<![CDATA[Apriandi, Riyki]]>
<![CDATA[ Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026 ]]>
Publisher : <![CDATA[Naval Architecture Department, Kalimantan Institut of Technology ]]>
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DOI: 10.35718/ismatech.v4i1.8481971
<![CDATA[This study evaluates the structural performance of polymer-based formwork systems using HDPE and ABS materials through numerical simulation based on the Finite Element Method (FEM). Rib design variations, including square, round, and honeycomb, were analyzed by considering key parameters such as deformation, elastic strain, equivalent stress, and safety factor. The applied loading conditions consisted of hydrostatic pressure from fresh concrete and additional loads due to the accumulation of upper structural segments. The results show that ABS exhibits higher stiffness, leading to lower deformation and elastic strain values compared to HDPE. Nevertheless, HDPE demonstrates competitive performance, offering advantages in ductility, environmental resistance, and lower weight. Among the design configurations, the honeycomb structure provides the most efficient load distribution and minimizes stress concentration more effectively than square and round designs. All models, for both HDPE and ABS materials, satisfy structural safety requirements with safety factor values greater than one. Therefore, the combination of ABS material and honeycomb rib design is recommended as an optimal solution for polymer-based formwork applications, while HDPE remains a viable alternative for applications requiring enhanced flexibility and environmental durability.]]>
