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Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim
Published by Universitas Maritim AMNI Semarang
ISSN : 29635012     EISSN : 29635454     DOI : 10.58192
Core Subject : Engineering,
Engineering Mechanical Engineering
Menyambut baik kiriman yang memberikan wawasan tentang masalah terkini dan utama yang berhubungan dengan ilmu Teknik dan Teknologi Maritim. Artikel bisa ditulis dalam bahasa Inggris atau bahasa Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 159 Documents
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Proses Penerbitan Sertifikat Kapal Berbendera Marshall Island untuk Persyaratan Crew on Board pada PT. Korin Global Mandiri Debi Aprilia Daniel; Jumriani Jumriani; Abdul Rahman
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4982

Abstract

This study aims to analyze the Marshall Island certificate issuance procedure, identify the obstacles encountered, and determine the company's efforts to overcome these obstacles to ensure smooth crew onboard placement. The research employed a descriptive qualitative approach, with data collected through observation, interviews, and documentation studies at PT. Korin Global Mandiri. The results indicate that the Marshall Island certificate issuance procedure is implemented through several stages, namely crew recruitment, document collection, document verification, selection of the form (MI-105 for officers and MI-273 for ratings), form completion, document upload to the International Registries Inc. (IRI) system, verification by the Republic of the Marshall Islands (RMI), and certificate issuance. The main obstacles identified include incomplete crew documents, inconsistencies in identity data, delays in document processing, and lack of crew discipline in submitting documents. To address these issues, the company conducts document rechecking, coordinates intensively with crew members, provides submission reminders, and monitors the certification process to minimize delays and support onboard placement.
Reduksi Dimensi Kompetensi SDM Sistem Inaportnet dengan Analisis Multivariat di Pelabuhan Tanjung Perak Anjar Pamungkas; Ariyono Setiawan; Shofa D. Robbi
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 3 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i3.5068

Abstract

This study examines the human resource (HR) competency structure regarding the use of the Inaportnet system at Tanjung Perak Port, Indonesia a major port currently undergoing an acceleration in the digitalization of vessel and cargo services. Grounded in a capability-based digital governance framework, the study aims to map key HR competency clusters using a multivariate approach. We applied Principal Component Analysis (PCA) and K-Means Clustering to questionnaire data from 100 respondents, utilizing 32 Likert-scale indicators. Notably, four principal components accounted for 86.5% of the total data variance, with the highest loadings observed in system understanding (λ = 22.0), digital responsiveness (λ = 2.7), and performance alignment (λ = 1.8). Clustering results indicate that 62% of respondents fall into the high-competency cluster, while 23% require further training particularly regarding issue resolution and evaluative feedback. These findings highlight a potential gap between digital system adoption and strategic HR development. The study contributes to strengthening competency-based training design and refining the theory of digital port governance in Southeast Asia.
Optimalisasi Waktu dan Biaya melalui Value Engineering Substitusi Standar Material Baja pada Proyek EPC Alde Noverli. Y; Rachmi Yanita
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.5296

Abstract

The implementation of Engineering, Procurement, and Construction (EPC) projects often encounters logistical and supply chain challenges, particularly when design specifications strictly adhere to foreign standards not locally available. This research evaluates the application of Value Engineering (VE) to resolve material scarcity in an integrated Central Processing Facility project in East Kalimantan. The initial design mandated Chinese standard (GB) materials, causing an 8-12 week import lead time that threatened the critical path of the lump-sum contract. Through a Technical Deviation Request (TDR), the engineering team proposed substituting GB materials with equivalent Indonesian National Standards (SNI) and ASTM materials. A multi-criteria decision analysis was utilized to ensure the structural integrity, verifying the geometric validation and mechanical capacities of local H-Beams and high-strength rebars. The results demonstrate a significant project acceleration of 30 days and a direct cost efficiency of 13% (Rp 1.625 billion). The substitution also reinforced local industry empowerment (TKDN) and minimized the carbon footprint of international logistics, all while strictly adhering to occupational health and safety (HSE) protocols.
Analisis Kekuatan Rangka Konveyor Pengangkut Sampah pada Sistem Rekayasa Air Menggunakan Finite Element Analysis Fendi Eka Ardinata
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 3 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i3.5316

Abstract

The accumulation of waste in the Sunter River, particularly at the Pulogadung Pumping Station, can obstruct pump operation and increase the risk of flooding. Conventional cleaning methods using trash barriers and excavators are considered less effective because they often leave residual waste behind. This study aims to design a belt conveyor for waste transportation that is suitable for the operating conditions of the pumping station and to evaluate the structural strength of its supporting frame under the maximum working load. The conveyor was designed using the VDI 2221 design methodology, which covers the stages from planning to detailed design. The structural performance of the conveyor frame was evaluated through Finite Element Analysis (FEA) using SolidWorks simulation software. The frame was modeled using AISI 1020 low-carbon steel and subjected to a static load of 1,000 kg at a conveyor inclination angle of 20°. The selected design has an overall length of 4,458 mm and a 700 mm wide cleated rubber belt driven by a 3 HP three-phase AC motor with a belt speed of 0.5 m/s. The FEA results indicate a maximum von Mises stress of 132.8 MPa, which is well below the yield strength of AISI 1020 steel (351.6 MPa). The maximum displacement was 1.71 mm, while the calculated factor of safety reached 2.6. These results demonstrate that the proposed belt conveyor frame satisfies the structural strength requirements and provides an adequate level of safety, making it a feasible alternative for improving waste transportation at the Pulogadung Pumping Station.
Desain Struktur Gedung Poltekes Mataram dengan Menggunakan Kolom Pipih Indrawan Indrawan; Hariyadi Hariyadi; Adryan Fitrayudha
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 3 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i3.5381

Abstract

The development of multi-story buildings requires structural systems capable of providing adequate strength, stiffness, stability, and spatial efficiency. One alternative is the use of flat columns as a substitute for conventional columns. This study aims to analyze the effect of flat columns on the structural performance of the Poltekkes Mataram Building through a structural redesign approach. The research employed a quantitative method using ETABS software to model and analyze two structural models: the existing structure with conventional columns and the redesigned structure with flat columns. Both models were designed with identical geometry, material properties, structural dimensions, and loading conditions. The evaluated parameters included axial force, column bending moment, beam internal forces, seismic base shear, and interstory drift. The results indicate that the use of flat columns increases the axial load capacity of columns, reduces column bending moments, and alters the distribution of internal forces in beams. In addition, the redesigned structure exhibits lower effective seismic weight and seismic base shear than the existing structure. The interstory drift values of both models satisfy the allowable limits, while the redesigned structure demonstrates smaller drift values. These findings indicate that flat columns can serve as a feasible alternative for improving structural efficiency while maintaining structural performance and safety against gravity and seismic loads.
Pengembangan Sistem Penyiraman Otomatis Berbasis Internet of Things untuk Optimalisasi Urban Farming: Studi Kasus: Poktan Bensor Semarang Muhammad Hasanuddin; Sulartopo Sulartopo; Dani Sasmoko
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 3 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i3.5408

Abstract

Urban Farming is a strategic solution for improving food security in urban areas through productive use of limited land and space Fei et al. However, manual watering remains a major obstacle, requiring time and labor while risking water volumes that mismatch plants' physiological needs Hayati. This study designs, builds, and implements an Internet of Things (IoT)-based automatic watering system to optimize Urban Farming at the Bendan Ngisor Farmer Group (Poktan Bensor), Semarang, capable of monitoring plant environmental conditions in real time and controlling watering automatically or manually from a distance Atzori et al., Kamienski et al. The system uses an ESP32 microcontroller as the control unit Espressif Systems, Kolban, a DHT22 sensor for temperature and humidity Aosong Electronics, Taiz et al. a Soil Moisture Sensor Bogena et al. Muñoz-Carpena, a relay actuator Petruzella, a DC water pump Çengel & Cimbala, and Telegram as the remote interface Telegram, Hidayat & Gunawan, following a Research and Development approach Monk. Results show the system reads parameters stably, executes automatic watering below the critical threshold (<40%), and sends Telegram Bot notifications with a 98.5% success rate, proving effective for sustainable Urban Farming management.
Manajemen Waktu Proyek Duplikasi Jembatan Akibat Durasi Pelaksanaan Uji Lapangan dan Waktu Tunggu Hasil Didit Darmawan; Rico Dicky Afrijal
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4357

Abstract

Field testing duration in bridge duplication projects affects the construction schedule through critical path determination, laboratory waiting time, and the potential need for retesting. Soil testing for foundation works and concrete mix testing for superstructure components consistently appear on critical activities that require close managerial attention. This study discusses how field and laboratory testing influence project time performance and identifies practical strategies to reduce delay risks. Management approaches that balance the need for accurate technical data with project completion targets include activity overlapping, rapid testing technologies, critical chain scheduling, and coordination among field teams, laboratories, consultants, and design teams. Contractual risk allocation clauses and variability-based contingency planning are important to manage uncertainty during testing activities. Seasonal weather factors must be incorporated into testing schedules because rainfall and site conditions can affect sampling and test execution. Retesting can be minimized through preliminary testing, certified material sources, and quality control. Testing-related delays may also affect contractor cash flow through milestone payment mechanisms.
Analisis Faktor Terjadinya Kecelakaan Kerja akibat Tidak Diterapkannya Budaya Keselamatan Kerja di KM. Dharma Kencana Wikandharu Cahya Amir; Bruce Rumangkang; Nurul Hatifah
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4403

Abstract

This research is motivated by a work accident experienced by one of the crew members of KM. Dharma Kencana. The crew member suffered an incident in which his ring finger was severed. Therefore, this study aims to analyze the causal factors of the work accident as well as preventive efforts to improve the occupational safety culture on board the ship. This study employs a descriptive qualitative method with data collection techniques through observation, interviews, and documentation during sea practice. The data were analyzed inductively to gain an in-depth understanding of the actual conditions in the field. The results show that the severing of the crew member's ring finger was caused by two factors: not using complete Personal Protective Equipment (PPE) and lack of vigilance while working. Efforts to reduce the risk of work accidents include implementing safety meetings and increasing supervision by officers. With these measures, it is expected that the awareness and compliance of crew members in using PPE will increase so that the risk of work accidents can be minimized and occupational safety on board ships is better guaranteed.
Optimalisasi Pelaksanaan Abandon Ship Drill untuk Meningkatkan Kecakapan para Kru Kapal ketika Terjadi Situasi Darurat Dimas Surya Wicaksono; Ngurah Ade Dwi Putra Yuda; Jaka Septian Kustanto; Fazri Hermanto
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4418

Abstract

Safety of life at sea is a crucial aspect in merchant vessel operations, making crew readiness in facing emergency situations extremely important. One effort to improve this readiness is through the implementation of abandon ship drills. However, in practice, drill implementation is often not fully effective in developing crew competence. This study aims to analyze crew readiness in conducting abandon ship drills and evaluate the extent to which drill implementation has been optimal in enhancing crew competence when facing emergency situations on MV. CNC TIGER. This research uses a descriptive qualitative method with data collection techniques including direct observation, interviews with the chief officer and third officer, and documentation studies. The data obtained were analyzed using gap analysis by comparing the practice of abandon ship drill implementation on MV. CNC TIGER with international regulations SOLAS 1974 Chapter III Regulation 19. The results showed that crew readiness in conducting abandon ship drills falls into the adequate category but is not yet optimal. Although drill frequency has met SOLAS requirements, crew response to emergency alarms remains slow, understanding of duties according to the muster list has not been fully mastered, and lifeboat launching has not been carried out according to established standards. Additionally, drill implementation tends to be administrative and lacks realism, thus failing to maximize crew competence development. Therefore, optimization of abandon ship drill implementation is needed through improved training quality, scenario realism, officer leadership, and continuous evaluation to enhance crew readiness and safety.
Analisis Penyebab Terjadinya Kandas KMP Agung Samudra XVIII saat Masuk Pelabuhan Gilimanuk Vanesha Arda Exstakarisma; Bruce Rumangkang; Nurul Hatifah
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 5 No. 2 (2026): Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v5i2.4488

Abstract

Shipping accidents, particularly ship grounding incidents, remain a major concern in maritime transportation because they may threaten navigational safety, disrupt port operations, and cause economic losses. Harbor waters with narrow channels, shallow depths, and unpredictable environmental conditions require ship officers to maintain high levels of accuracy and coordination during maneuvering activities. This study examines the factors that caused the grounding of KMP Agung Samudra XVIII while approaching Gilimanuk Harbor. The research employed a qualitative descriptive approach through direct onboard observation, interviews with the master, second officer, helmsman, and chief engineer, as well as analysis of operational records and incident documentation. The collected data were analyzed by identifying the relationship between operational conditions and the actions taken by the ship’s crew before the accident occurred. The findings reveal that the grounding incident was not caused by a single factor, but rather by the interaction of environmental conditions, human factors, and technical issues. Strong sea currents and wind pressure significantly affected the vessel’s maneuverability during harbor entry. In addition, delayed responses from the officer on watch and insufficient communication with the master reduced the effectiveness of navigational decision-making. Technical disturbances in the steering system also contributed to the vessel’s inability to maintain a safe course. As a result, the ship drifted outside the intended navigation lane and eventually ran aground. The study highlights the importance of improving bridge team coordination, strengthening emergency response procedures, and ensuring the reliability of steering equipment in order to minimize the possibility of similar maritime accidents in harbor areas.

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