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International Journal of Marine Engineering Innovation and Research
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : 25415972     EISSN : 25481479     DOI : ttp://dx.doi.org/10.12962/j25481479
Core Subject : Science, Social, Engineering,
Automotive Engineering Control & Systems Engineering Decision Sciences, Operations Research & Management Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mechanical Engineering Physics Transportation
International Journal of Marine Engineering Innovation and Research (IJMEIR) is an open-access journal, which means that visitors all over the world could publish, read, download, cite and distribute papers published in this journal for free of cost. IJMEIR journal has a vast group of visitors, a far-reaching impact and pretty high citation. IJMEIR adopts a peer-review model, which insured fast publishing and convenient submission. IJMEIR now cordially inviting you to contribute or recommend quality papers to us. This journal is geared towards the dissemination of original innovation, research and practical contributions by both scientists and engineers, from both academia and industry. Theses, dissertations, research papers, and reviews associated with all aspects of marine engineering, marine sciences, and marine technology are all acceptable for publication. International Journal of Marine Engineering Innovation and Research (IJMEIR) focus and scopes are preserve prompt publication of manuscripts that meet the broad-spectrum criteria of scientific excellence. Areas of interest include, but are not limited to: Automotive Biochemical Biology Biomedical science Biophysics and biochemistry Chemical Chemistry Combat Engineering Communication Computer science Construction Energy Energy storage Engineering geology Enterprise Entertainment Environmental Environmental Engineering Science Environmental Risk Assessment Environmental technology Financial Engineering Fire Protection Engineering Fisheries science Fishing Food Science and Technology Health Care & Public Health, Health Safety Health Technologies Industrial Technology Industry Business Informatics Machinery Manufacturing Marine Engineering Marine sciences Marine technology Marine biology Marine economic Marine engines Marine fisheries Marine fuel Marine geology Marine geophysic Marine management Marine oil and gas Marine policy Material sciences Materials science and engineering Mathematics Mechanics Medical Technology Metallurgical Micro-technology Military Ammunition Military Technology Military Technology and equipment Mining Motor Vehicles Naval Engineering Neuroscience Nuclear technology Ocean Robotics and Automation Safety Engineering Sanitary Engineering Space Technology Statistics Traffic Transport Visual Technology
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 1,231 Documents
 120   121   122   123   124 
Analisis Numerik Peredaman Gelombang oleh Hutan Bakau Mustarakh Gelfi; Suciana; Ayu Libiaty Ahmad; Muhammad Fatkhurrozi; Mochammad Meddy Danial; Salika Thilakarathne
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Mangrove forests provide natural coastal protection by attenuating wave energy, although their protective effectiveness remains challenging to quantify. In particular, the contributions of vegetation density and of the bulk drag coefficient are seldom separated, and open-source wave-resolving models are rarely checked against prototype-scale physical-model data. This study aims to quantify wave attenuation across a mangrove band at its seaward edge (x = 35 m), its middle (x = 44 m) and its landward edge (x = 52 m); to isolate the independent effects of vegetation density and of the drag coefficient (Cd); and to assess the consistency of the model against a prototype-scale physical benchmark. The XBeach numerical model was applied in non-hydrostatic (wave-resolving) mode to a 104 m numerical flume, with vegetation schematised into root, trunk and canopy layers, each with its own stem diameter, density and drag coefficient. Simulations were performed for three scenarios — no mangroves, low-density mangroves (N = 25 stems m⁻²) and high-density mangroves (N = 50 stems m⁻²) — with additional sensitivity tests varying the drag coefficient (Cd = 2.0 and Cd = 1.5). The analysis focused on three key wave parameters: water level, zero-crossing wave height, and significant wave height. Results show that high-density mangroves reduce the band-averaged significant wave height by 24%, whereas low-density mangroves achieve a 15% reduction compared with unvegetated conditions, so halving the stem density approximately halves the reduction. Lowering the drag coefficient to Cd = 2.0 and Cd = 1.5 reduced the attenuation to 18% and 17%, a monotonic but sub-linear dependence, matching the trend observed in a prototype-scale physical model experiment. These findings highlight the significant influence of vegetation density and drag on wave attenuation and support the use of mangroves as effective nature-based solutions for coastal defence and sustainable coastal management
Overtime Drivers and Work–Rest Compliance among Indonesian Deck Seafarers: Implications for Maritime Traffic Safety Joe Ronald Kurniawan Bokau
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Work-rest compliance is an important component of maritime safety because deck seafarers are responsible for watchkeeping, lookout, vessel traffic monitoring, bridge communication, and navigational decision-making. Although international regulations emphasize adequate rest to reduce fatigue risk, overtime may still occur due to operational, technical, administrative, and regulatory demands. This study examines overtime drivers and work-rest compliance among Indonesian deck seafarers and discusses their implications for maritime traffic safety. A quantitative descriptive survey was conducted using data from 587 Indonesian deck seafarers. The variables included work-rest regulation status, overtime violation, overtime frequency, rest adequacy, rest disturbance, rest-performance awareness, overtime reasons, and vessel group. Descriptive statistics and chi-square tests were used to analyze the data. The results showed that 71.0% of respondents reported good work-rest regulation status, while 32.0% reported overtime violation and 52.1% reported high overtime frequency. Although 82.8% reported adequate rest and 98.3% recognized that good rest supports performance, 35.9% still experienced high rest disturbance. The main overtime drivers were preparation for Port State Control or external inspection (27.1%), critical equipment or machinery problems (25.9%), administrative reporting (12.8%), additional work due to new regulations (11.2%), and post-dry-docking or additional repair work (11.1%). High overtime differed significantly by vessel group, χ²(4) = 9.901, p = 0.042, and overtime violation also differed significantly by vessel group, χ²(4) = 13.205, p = 0.010. These findings suggest that overtime among deck seafarers is not merely an individual behavior issue, but is shaped by operational and regulatory workload pressures. Strengthening fatigue-risk management requires attention to inspection workload, technical readiness, administrative burden, vessel-type operational patterns, and rest protection
Interpretable Machine Learning for NOx Emission Anomaly Detection in Marine Diesel Engines Using Real Operational Data Imam Nur Rokhim; Teguh Junian Kuswanto; Muhammad Iqbal Firdaus
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Nitrogen oxide (NOx) emissions from marine diesel engines remain a major environmental concern in the maritime industry, requiring effective monitoring strategies under actual operating conditions. This study proposes a Random Forest-based approach for detecting anomalous operating conditions associated with NOx emissions using operational data collected from an actual merchant vessel during an 11-day voyage. Following data preprocessing and threshold-based operational screening, a total of 347,587 valid observations were retained for model development. The Random Forest classifier was evaluated using Accuracy, Precision, Recall, F1-score, and ROC-AUC. The proposed model achieved an Accuracy of 96.87%, Precision of 97.35%, Recall of 93.18%, F1-score of 95.22%, and a ROC-AUC of 99.39%, demonstrating reliable classification performance for distinguishing normal and anomalous operating conditions. Feature importance analysis revealed that operational parameters contributed differently to the classification process, with ship speed and fuel system parameters exhibiting the greatest influence. An engineering interpretation of these findings indicates that the identified parameters are consistent with established combustion mechanisms associated with thermal NOx formation in marine diesel engines. The proposed approach extends the application of machine learning beyond anomaly detection by providing an interpretable framework that links data-driven classification results with engineering knowledge, offering potential support for onboard condition monitoring and operational decision-making in NOx emission management.
Navigating Climate Uncertainty: Local Cultural Strategies for Building Resilience among Nias Fishermen Tirta Anugerah; Nabila Khairiyah Sitompul; Eko Wahyono; Husnul Yaqin Harahap; Muhammad Latiful Khobir; Rifka Hadia Lubis; Riwayani
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Climate change increases the vulnerability of fishing communities through weather uncertainty, changes in fishing seasons, declining catch yields, and household income instability. This study aims to formulate strategies to enhance the resilience of fishermen on Nias Island based on local culture in the face of climate change. The study employed a Strengths, Weaknesses, Opportunities, and Threats (SWOT) analysis based on internal and external factors affecting fishermen’s adaptive capacity. The analysis results show an IFAS score of 2.314 and an EFAS score of 2.120, with the strategy positioned in Quadrant I (aggressive). The primary strengths of Nias fishermen stem from their cultural values and seafaring traditions, as well as their local knowledge in understanding ocean conditions and seasons. Conversely, the main weaknesses lie in the low level of processing and value addition of fishery products, as well as the weak economic capacity of fishing households. The greatest opportunities stem from the potential of fishery resources and support from capacity-building programs, while the main threats include weather uncertainty, declining catch yields, and fluctuations in the prices of fishery products. The resulting strategies focus on strengthening adaptation based on local culture, increasing the value added of fishery products, strengthening institutions, and community-based management of coastal resources. These findings indicate that local culture and traditional ecological knowledge are key assets in enhancing the resilience of Nias fishermen to climate change.
A Mixed Integer Linear Programming Model for Cost and Carbon Aware LPG Vessel Speed Optimization under Terminal Congestion Dimas Kunto Wibisono; Beny Cahyono; Semin; Muhammad Revanza Maulana
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Port congestion has become one of the major operational challenges in LPG logistics because it increases vessel waiting time, bunker consumption, operating costs, and greenhouse gas emissions. Conventional congestion mitigation often relies on infrastructure expansion, which requires substantial investment and long implementation periods. This study aims to develop a Mixed Integer Linear Programming (MILP) model that synchronizes LPG vessel arrival with jetty availability through optimal vessel speed selection to minimize bunker costs while reducing carbon emissions. A MILP optimization model was developed using operational data from Terminal LPG Tanjung Sekong, Indonesia. The model incorporates jetty capacity, vessel schedules, sailing time, processing time, fuel consumption, bunker prices, and vessel compatibility constraints to determine whether each vessel should operate at service speed or slow-steaming speed. Results show that the proposed model reduces bunker costs by USD 46,675/month, decreases jetty waiting time by 3.26 days/month, and lowers carbon emissions by 221.7 tCO₂/month. These findings demonstrate that synchronizing vessel arrival with terminal readiness provides a practical operational alternative to infrastructure expansion while supporting maritime decarbonization.
Karakteristik dan Kelimpahan Mikroplastik di Air, Sedimen, dan Sulcospira testudinaria di Sistem Budidaya Air Tawar Nailul Izzah; Asus Maizar Suryanto Hertika; Nanik Retno Buwono
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Microplastic contamination has become an emerging issue in freshwater ecosystems due to its persistence and potential ecological impacts. This study aimed to investigate the characteristics, abundance, and pollution status of microplastics in the water, sediment, and the freshwater gastropod Sulcospira testudinaria along the flow of the Freshwater Aquaculture Installation (IBAT) Punten, Batu City, Indonesia. Microplastics were identified using an inverted microscope, while pollution levels were assessed using the Microplastic Contamination Factor (MCF) and Microplastic Pollution Load Index (MPLI). Film was the dominant type in water and S. testudinaria, whereas fragments predominated in sediment. Brown is the most abundant colors across all environmental compartments, indicating extensive weathering of plastic debris. Microplastic abundance was highest in sediment, confirming its role as the primary sink for microplastics in the aquatic environment. MCF analysis indicated that most sampling sites were classified as significant contamination, while sediment at Site 2 reached the very high contamination category. MPLI values of 3.48 (water), 4.34 (sediment), and 3.16 (S. testudinaria) further indicated a very high level of microplastic pollution. These findings demonstrate widespread microplastic contamination throughout the IBAT Punten freshwater system and highlight sediment and S. testudinaria as effective indicators for monitoring freshwater microplastic pollution.
Pollution Prevention by Design for Wing-in-Ground Craft: A Technical Design Review Based on IMO Environmental Requirements Sidrotul Muntaha; Heri Sutanto; Miftakhul Hadi; Antoni Arif Priadi; Imam Sutrisno
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The increasing development of Wing-in-Ground (WIG) craft as an energy-efficient maritime transportation system has highlighted the importance of integrating environmental protection into the early stages of vessel design. Although WIG craft offer advantages in fuel efficiency and reduced operational resistance through the ground effect phenomenon, their unique operational characteristics introduce environmental risks associated with fuel leakage, solid waste, sewage discharge, and atmospheric emissions. Existing WIG craft designs primarily emphasize aerodynamic and hydrodynamic performance, while environmental protection systems are often considered secondary, potentially compromising regulatory compliance and operational sustainability. This study aims to evaluate the implementation of the Pollution Prevention by Design (PPbD) concept in WIG craft through a Technical Design Review (TDR) based on the environmental requirements established by the International Maritime Organization (IMO). A qualitative design assessment was conducted by reviewing four principal environmental protection systems: fuel and lubrication systems, solid waste management, sewage treatment, and air emission control. The evaluation was performed using compliance criteria derived from relevant IMO instruments, including MARPOL Annexes I, IV, V, and VI, together with the IMO Guidelines for Wing-in-Ground Craft. The review indicates that the baseline WIG craft design exhibits limited compliance with environmental protection requirements, particularly in fuel containment, sewage management, and emission mitigation. Several design improvements are proposed, including double-wall fuel tanks, leak detection systems, modular waste storage, compact sewage treatment units, and low-emission propulsion technologies. The findings demonstrate that integrating pollution prevention measures during the conceptual design stage significantly enhances environmental performance without compromising operational efficiency. This study contributes a structured technical review framework that supports environmentally sustainable WIG craft development while facilitating compliance with international maritime environmental regulations.
Management Status of Tuna Longline Fisheries Based on Cilacap Ocean Fishing Port: an Ecosystem Approach Iftitah Aura Azzahra; Ronny Irawan Wahju; Am Azbas Taurusman
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The tuna fishery in the Indian Ocean faces increasing ecological pressure due to overfishing, the capture of juvenile tuna, and bycatch of endangered, threatened, and protected (ETP) species. These issues threaten the sustainability of tuna resources in Fisheries Management Area 573 (FMA 573). This study evaluated the sustainability of the tuna longline fishery at Cilacap Ocean Fishing Port (PPS Cilacap) using the Ecosystem Approach to Fisheries Management (EAFM). A descriptive approach with a composite index assessment was applied across six EAFM domains: fishery resources, aquatic habitats and ecosystems, economy, social, fishing techniques, and institutional. Data were collected through field observations, structured interviews, questionnaires, and document reviews. The assessment showed that the fishery resources (59.71), aquatic habitats and ecosystems (51.67), and economic (51.52) domains were classified as ‘moderate’, while the institutional domain (78.94) was ‘good’, and the social (87.90) and fishing techniques (81.38) domains were ‘very good’. Overall, the tuna longline fishery achieved a composite score of 68.52, indicating a ‘good’ management status. However, improvements are still required, particularly in strengthening fishery resource management, habitat conservation, bycatch mitigation, and monitoring systems. These findings provide scientific support for strengthening ecosystem-based fisheries management and promoting the long-term sustainability of tuna longline fisheries in FMA 573.
Alkali Treatment and Concentration Effects on Epoxy/Agel Fiber Composite Mechanical Properties for Marine Engineering Use Risa Nurin Baiti; I Wayan Padma Yogi Asana; Widya Emilia Primaningtyas; Imah Luluk Kusminah; Slamet Raharjo; I Komang Adi Wiranata; Komang Widhi Widantha
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

The development of polymeric composite materials in shipbuilding has increased tremendously. To improve the sustainability of ship hulls, natural fibers have gained increasing attention as an alternative reinforcement material in polymer composites due to their renewability, low cost, and favorable specific mechanical properties. One of the natural resources that can be used as fiber reinforcement is agel leaf fibers (ALF). ALF is harvested from Corypha gebanga plant that is available throughout Indonesia. However, the inherent hydrophilicity and presence of non-cellulosic constituents on natural fiber surfaces often result in poor interfacial bonding with hydrophobic polymer matrices, limiting composite performance. This study investigated the effect of NaOH concentration and alkali treatment duration on the tensile properties of agel fiber-reinforced epoxy composites. Agel fibers were treated with NaOH solutions at concentrations of 1%, 2%, 3%, 4%, and 5%, with immersion durations of 1, 2, 3, and 4 hours, then rinsed with distilled water until reaching a neutral pH (7.5–8.5). The treated fibers were used as reinforcement in epoxy matrix composites fabricated using a self-made resin transfer equipment. Tensile testing was conducted at a loading speed of 5 mm/min to evaluate tensile strength and elongation at break for each treatment combination. Results showed that both NaOH concentration and treatment duration influenced mechanical performance in different manner. The mechanical properties of composites improved with longer duration. However, the effect of alkali concentration is more complex. The strength and stiffness behaves inversely with ductility. So the optimum parameter of ALF’s alkalization should be decided carefully depending on the priority of the mechanical characteristics required in the application. Based on the dataset obtained from the experiment, it is suggested that alkali treatment in 1% NaOH for 4 hours, yields a good balance of tensile strength, modulus of elasticity, and maximum elongation among all combinations.
Enhancing the Reliability of Marine Main Diesel Engines: A Review of Failure Modes, Maintenance Strategies, and Condition Monitoring Azizs Yulihantro; Semin
International Journal of Marine Engineering Innovation and Research Vol. 11 No. 3 (2026)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v11i3

Abstract

Marine main diesel engine failures remain one of the largest sources of operational risk and commercial loss in merchant shipping, with loss of propulsion consistently ranked as a top machinery casualty category and engine maintenance quality now an explicit criterion in commercial vetting regimes such as SIRE 2.0. However, existing reviews largely treat maintenance strategy selection as a generic engineering problem, without systematically linking specific failure-mode behavior to strategy assignment or consolidating condition monitoring techniques into a subsystem-specific, actionable guide; this leaves fleet operators without a unified decision tool connecting failure diagnosis, strategy selection, and monitoring technology. This review therefore aims to (1) identify the dominant failure modes and root causes of marine main diesel engines reported in the peer-reviewed literature, (2) systematize available maintenance strategies through an integrated Failure Mode and Effects Analysis-Reliability-Centered Maintenance (FMEA–RCM) decision framework that assigns each strategy to specific subsystems; and (3) map condition monitoring techniques onto main engine components to support the transition from time-based to condition-based maintenance (CBM). A narrative literature review methodology was employed, combining structured database searches (Scopus, Web of Science, Google Scholar) with backward citation tracking across 31 peer-reviewed journal articles, textbooks, international standards, and maritime authority casualty reports published between 1997 and 2025, synthesized thematically using the bathtub failure-rate model and FMEA–RCM decision logic as the integrating analytical framework. The review found that the fuel injection system, cylinder components, turbochargers, and the lubricating and cooling oil systems are the dominant contributors to main engine unreliability, with root causes concentrated in fuel and lubricant quality, thermal overload, and deferred maintenance rather than in inherent design deficiency. A hybrid maintenance architecture combining time-based tasks for age-related failure modes with CBM for randomly occurring, detectable degradation emerged as the most effective strategy, with lubricating oil analysis, thermodynamic performance monitoring, vibration analysis, and thermography constituting the principal CBM toolkit, and organizational integration into the planned maintenance system identified as the key remaining implementation barrier..

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