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All Journal EPI International Journal of Engineering Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Techno Bahari Maritime Park: Journal Of Maritime Technology and Socienty Jurnal Riset & Teknologi Terapan Kemaritiman Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Sitorus, Chris Jeremy Verian
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Tug-Barge Operating Costs based on Charterer Versus Ownership Perspective. A Case Study: Nickel Ore Transport Boenaga-Fatufia Route Sitorus, Chris Jeremy Verian; Idrus, Misliah; Chaerunnisa, Andi Sitti
EPI International Journal of Engineering Vol 6 No 1 (2023): Volume 6 Number 1, February 2023
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/epi-ije.022023.07

Abstract

The Tug-barge operating costs for nickel ore transhipment at Boenaga-Fatufia are based on charter and shipowner. A comprehensive study on Tug-barge investment feasibility needs to focus on the most profitable option. This study aims to determine the feasibility of investing in a Tug-barge, considering a charter Tug-barge with shipowner (newbuilding tug-barge and secondhand Tug-barge is feasible compared to a new building Tug-barge and charter Tug-barge. The highest NPV is for the secondhand Tug-barge, IDR 18.642.830.529; rhe secondhand Tug-barge also gas the highest IRR value of 20%. The secondhand Tug-barge has the fastest Payback Period, Which is 4.18 years.
CAD Technology Workshop with the Pierre Bougher Approach in Building Traditional Wooden Ships at Kelompok Usaha Bersama (KUB) Nenang Berlayar North Penajam Paser Hariyono, Hariyono; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian
Indonesian Journal of Maritime Technology Vol. 2 No. 2 (2024): Volume 2 Issue 2, December 2024
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v2i2.1279

Abstract

Program in the form of a CAD Technology Workshop using the Pierre Bouguer approach aims to improve the skills of traditional wooden ship craftsmen in the Kelompok Usaha Bersama (KUB) Nenang Berlayar, Penajam Paser Utara. This activity introduces Computer-Aided Design (CAD) technology as a modern solution to increase the precision, efficiency and quality of wooden ship designs without eliminating traditional values. Pierre Bouguer's approach which focuses on the stability and balance of the ship through drawing lines plans was applied to produce a better design from a technical and safety perspective. Implementation methods include intensive training, technical assistance, and ongoing evaluation, supported by lecturers and students from the Kalimantan Institute of Technology (ITK). The results of the activity showed a significant increase in craftsmen's understanding and ability to use CAD, as seen from the post-test results of participants who achieved an application level above 90%. This program not only helps craftsmen adopt modern technology but also creates a sustainable learning ecosystem through an online-based community. It is hoped that the application of CAD technology can encourage innovation in traditional wooden shipbuilding, increase competitiveness, and provide added economic value for craftsmen amidst the challenges of modernizing the maritime industry.
Preliminary Design and Energy Production of a Mobile Floating Structure (MFS) for Offshore Wind Turbines in Indonesian Waters Pawara, Muhammad Uswah; Sitorus, Chris Jeremy Verian; Hariyono, Hariyono; Arifuddin, Andi Mursid Nugraha; Alamsyah, Alamsyah; Hidayat, Taufik; Suardi, Suardi; Syadzali, Abdul Mujib; Mahmuddin, Faisal
EPI International Journal of Engineering Vol 8 No 1 (2025): Volume 8 Number 1, Februari 2025
Publisher : Center of Techonolgy (COT), Engineering Faculty, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The Mobile Floating Structure (MFS) is an innovative floating wind turbine concept that utilizes a catamaran hull design to enhance mobility and operational efficiency. Unlike stationary platforms, the MFS can relocate to areas with higher wind energy density, making it a promising solution for optimizing wind energy harvesting in offshore environments. This study focuses on the preliminary design and energy production of the MFS. Maxsurf is used to analyze hydrostatics and assess the hydrodynamic performance of the MFS hull after the dimension of the MFS is determine with key considerations including rotor diameter and the weight of the wind turbine. Furthermore, four wind turbines are installed in the MFS. Those aspect were integrated into the design process to ensure realistic operational adaptability. As result. the resulting dimensions of the MFS were determined utilizing Maxsurf. Moreover, different with the previous study that use satellite data, the present study employs reanalysis data to estimate the energy density and power production of MFS. the energy density map is also produced in the present study to determine the monthly location of the MFS. The energy production of the MFS with four turbines has been calculated, and the energy production map is also drawn. Finally, the energy production of the MFS in the chosen location has also been estimated. The energy production map can be utilized to develop MFS in other location.
Evaluasi Kebutuhan Energi Listrik untuk Sistem Penerangan dan Peralatan Pendukung Operasi pada Kapal Rumah Sakit Tipe LCT Suardi, Suardi; Raditya, Muhammad Yogi; Mubarak, Azhar Aras; Hariyono, Hariyono; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian
Jurnal Riset & Teknologi Terapan Kemaritiman Vol. 3 No. 2 (2024)
Publisher : Departemen Teknik Sistem Perkapalan, Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25042/jrt2k.122024.05

Abstract

Analisis kebutuhan daya generator untuk mendukung sistem penerangan dan peralatan operasional pada kapal rumah sakit tipe LCT (Landing Craft Tank) merupakan aspek krusial dalam menjamin keandalan dan efisiensi operasional sistem kelistrikan kapal. Kapal ini berfungsi sebagai rumah sakit terapung, sehingga memerlukan pasokan listrik yang stabil dan andal untuk menunjang perangkat medis, sistem navigasi, serta peralatan pendukung lainnya. Permasalahan utama yang diangkat dalam penelitian ini adalah belum optimalnya perencanaan kapasitas daya generator dalam memenuhi beban listrik secara menyeluruh, khususnya pada kondisi puncak dan situasi darurat. Tujuan dari penelitian ini adalah untuk menentukan kapasitas optimal generator berdasarkan total konsumsi daya dari setiap beban listrik yang ada, dengan mempertimbangkan margin keamanan, kondisi operasional, serta keberlanjutan sistem daya. Metode yang digunakan meliputi identifikasi dan penghitungan beban listrik, analisis distribusi daya, serta evaluasi terhadap keandalan sistem kelistrikan berdasarkan referensi teknis terkini. Sebagai state of the art, pendekatan ini selaras dengan praktik terbaik dalam perancangan sistem kelistrikan kapal modern, yang mengutamakan efisiensi energi, keberlanjutan, dan keselamatan. Hasil penelitian menunjukkan bahwa pemilihan kapasitas generator yang tepat tidak hanya meningkatkan efisiensi operasional, tetapi juga berperan penting dalam menjaga keselamatan pasien dan awak kapal. Rekomendasi dari studi ini menekankan pentingnya integrasi sistem monitoring daya secara real-time dan pemeliharaan berkala untuk mendukung keberlanjutan layanan kapal rumah sakit. Temuan ini diharapkan menjadi rujukan dalam pengembangan sistem kelistrikan kapal serupa di masa depan, khususnya dalam konteks pelayanan medis maritim yang tanggap dan andal.
Determination of Electrical Power for Lighting Distribution Using LED Lights on KM. Tuna Kita Suardi, Suardi; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian; Arifuddin, Andi Mursid Nugraha; Pawara, Muhammad Uswah; Hariyono, Hariyono; Alamsyah, Alamsyah; Cahyani, Alviana Eka; Mubarak, Azhar Aras; Lumenteri, Fido Fortunatus
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.1287

Abstract

Fishing vessels are specialized ships designed to support commercial fishing operations by integrating various structural and functional elements such as hull dimensions, deck layout, load capacity, crew accommodations, propulsion systems, and supporting equipment. One critical yet often overlooked component of such vessels is the lighting system, which plays a key role not only in ensuring operational safety and visibility but also in enhancing fishing effectiveness, particularly during night operations. Currently, many fishing vessels still rely on conventional fluorescent lighting, which is less energy-efficient and has a shorter operational life compared to modern alternatives such as LED technology. This study addresses the inadequacy of current lighting installations on fishing vessels by proposing a redesigned electrical installation system utilizing LED lamps. The objective is to develop an efficient and functionally optimized lighting plan that reduces energy consumption and operational costs while improving onboard visibility. Additionally, LED lights can serve dual purposes on fishing vessels—not only for general illumination but also as fish-attracting lights, which may contribute to increased catch yields. The research employs the Zonal Cavity Method (also known as the Lumen Method) as the primary analytical approach. This method enables the calculation of illumination levels by considering inter-surface reflectance and dividing each interior space into three distinct zones: the High Ceiling Cavity (HCC), High Room Cavity (HRC), and High Floor Cavity (HFC). Illumination levels are then determined according to established lighting standards for each functional area within the vessel. The results of the analysis demonstrate that LED-based lighting systems significantly outperform fluorescent systems in terms of energy efficiency, uniformity of light distribution, and alignment with lighting standards. Furthermore, the proposed installation plan offers long-term operational benefits, including reduced maintenance requirements and lower power consumption. The findings support the broader adoption of LED lighting in small-scale fishing vessels and suggest further research into integrating solar-based energy systems to enhance sustainability and self-sufficiency in future vessel designs.
Effect of Lifting Lug Hole Diameter Size on Strength Performance in Ship Block Lifting Process: English Arifuddin, Andi Mursid Nugraha; Nizam, Syahrul; Pawara, Muhammad Uswah; Sitorus, Chris Jeremy Verian; Rachmianty, Andi; Ningrat, Andi; Baso, Suandar
Indonesian Journal of Maritime Technology Vol. 3 No. 1 (2025): Volume 3 Issue 1, June 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v3i1.8481345

Abstract

The safety of the ship block lifting process is always a serious concern during the assembly of ship blocks. The block/structure and equipment must not be damaged during the lifting process. This study aims to determine the structural response values that occur with various hole diameter sizes of the lifting lug during the ship block lifting process. The object of this research is a ship block from the new construction of the Ferry Ro-Ro 1500 GT. The method used is numerical simulation based on finite element method (FEM) software. The simulation is conducted to obtain the stress and deformation values for each size of the lifting lug. The selected ship block load is the largest ship block load, which is 52,380 tons. The number of lifting lugs used in the simulation is 5, with varying diameters of 53, 58, 63, 68, and 73 cm. Based on the simulation results, the diameter of 63 mm gets the minimum normal and shear stress figures. While the minimum von misses stress figure is shown by the variation of the diameter of 73 mm. While the smallest deformation figure is shown by the variation of the diameter of 53 mm. In general, all variations of lifting lug holes can still be applied with the note that the weight of the load must be considered.
Design of Phinisi Tourism for IKN-Balikpapan Bay Route Alamsyah, Alamsyah; Abdillah, Riza; Suardi; Sitorus, Chris Jeremy Verian; Kustiwansa, Harlian; Hariyono
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 2, July 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.44451

Abstract

Balikpapan Bay connects Balikpapan City with the new capital city of the Republic of Indonesia (IKN). Currently, many community activities in Balikpapan Bay include functioning as a crossing, loading and unloading, and fishing. Balikpapan Bay also offers an unforgettable water tourism experience with many intriguing attractions for all ages, such as water slides and diving. IKN is utilized by the development of marine transportation to create marine tourism potential in Balikpapan Bay. The purpose of the research project is to build a tourist phinisi ship that allows tourists from within and outside the country to spend their free time on board and enjoy the splendor of Balikpapan City and IKN with a cultural concept. Phinisi will be equipped with lodging, museums, cafes, and restaurants, all depending on the design of the boat. The research stages include designing a general arragement that produces data in the form of main dimensions, hull form coefficients, lines plans, general arrangements, 3D designs, and interior rooms. The research method used is the parentship approach. The main dimensions obtained in my final assignment include; loa = 55 m, B = 9 m, H = 5 m, T = 3.5 m, Vs = 9 Knots, Crew 11 people, passengers = 15 people
The General Arragement of Water Bus on Mahakam River's Alamsyah, Alamsyah; Pawara, Muhammad Uswah; Ikhwani, Rodlian Jamal; Sitorus, Chris Jeremy Verian; Kumandang, Niti Gede
Maritime Park: Journal of Maritime Technology and Society Volume 4, Issue 3, 2025
Publisher : Department of Ocean Engineering, Faculty of Engineering, Hasanuddin University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/mp.vi.44430

Abstract

Mahakam River has its own place in the hearts of domestic and foreign tourists. The beauty of the Mahakam river can be enjoyed by using a water bus made of wood. Currently, there are 2 (two) water buses available on the Mahakam river to serve tourists who want to explore its beauty. It was found that the water bus did not meet adequate safety and seaworthiness standards. Referring to the mission of the Tourism Office of the city of Samarinda, namely increasing the development of tourist destinations in the city of Samarinda, the renewal of tourist water buses that are adequate and in accordance with the standards of feasibility and safety is something that is really needed. The purpose of this study is to provide an alternative to the existing water bus design as an effort to rejuvenate the tourism fleet operating on the Mahakam river. The research stages include designing a general arragement for a tourism water bus that produces data in the form of main dimensions, hull form coefficients, lines plan, general arrangement, 3D design, and ship accommodation interiors. The results obtained are the main size of the ship with the following details; L = 14.04 m, B = 5 m, H = 1.4 m, T = 1.1 m, Vs = 10 knots, Engine Power = 87.4 HP (For 2 Engines), Number of Passengers and Crew = 80 Persons. Initial stability was found to meet the criteria.
Seakeeping Performance and Passenger Comfort Assessment of a 300 GT Ro-Ro Ferry Using RAO, MSI, and MII Analyses Wahidah, Jusma; Ariani, Vidya Rezeki; Alamsyah; Wulandari, Amalia Ika; Suwedy, Wardina; Sitorus, Chris Jeremy Verian; Hariyono; Kustiwansa, Harlian; Agusty, Cindy Lionita; Syam, Muhammad Anjas
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 6, Number 3, November 2025 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

This study examines the motion response and onboard comfort of a Ro-Ro ferry under varying wave directions and speeds using the Response Amplitude Operator (RAO), Motion Sickness Incidence (MSI), and motion-induced interruptions (MII) as evaluation parameters. Simulations were conducted using Maxsurf Motion software with wave heights of 3 m and 3.5 m and encounter angles of 0° (following seas), 90° (beam seas), and 180° (head seas) at vessel speeds of 0 and 12 knots. The MSI was assessed using both simulation results and empirical calculations, whereas the MII was evaluated according to the ISO 2631 standards at three onboard locations: the passenger, navigation, and vehicle decks. The RAO results indicate that the vessel met the NORDFORSK (1987) motion criteria under following and head seas but exceeded the roll limits in beam seas. The MSI values remained within the moderate comfort range, except under head seas at 12 kn, where the values approached the alert thresholds. The MII remained within acceptable levels under most conditions, although probable interruption levels were observed on the passenger and vehicle decks during beam sea conditions. Overall, the findings emphasize that wave direction and vessel speed significantly influence motion-induced discomfort and operational performance, underscoring the importance of optimizing route planning and speed to improve passenger safety and seakeeping performance on roll-on/roll-off ferries.
Analisis Dinamika Kapal Ikan Berlambung Katamaran terhadap Fenomena Bottom Slamming dan Deck Wetness Sitorus, Chris Jeremy Verian; Alamsyah; Setiawan, Wira; Anjas Syam, Muhammad; Lionita Agusty, Cindy; Wahidah, Jusma; hariyono; Kustiwansa, Harlian; Syahab, Husein; Wahyu Pratama, Fernanda; Bahri, Irham
Techno Bahari Vol 12 No 1 (2025): Maret
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i1.346

Abstract

Kurangnya perhatian terhadap aspek keselamatan dalam desain kapal ikan, di mana pembuat kapal lebih berfokus pada hasil tangkapan. Analisis bottom slamming dan deck wetness diperlukan untuk menghindari kondisi berbahaya saat menghadapi cuaca buruk. Nilai RAO(Response Amplitude Operator) kapal ikan katamaran perlu untuk diketahu dengan variasi sudut gelombang 0°, 90°, 135°, dan 180° serta menghitung probabilitas deck wetness dan bottom slamming. Perhitungan RAO dilakukan menggunakan metode optimasi dengan perangkat lunak Maxsurf pada variasi muatan 25% DWT ,50% DWT, dan 100% DWT. Hasil penelitian menunjukkan bahwa amplitudo heave tertinggi terjadi pada kondisi 100% DWT, kecepatan 6,45 knot, dan sudut gelombang 0°, sebesar 0,131 meter. Amplitudo pitch tertinggi adalah 2,02 derajat pada kondisi yang sama, sedangkan amplitudo roll tertinggi terjadi pada 50% DWT, kecepatan 6,45 knot, dan sudut gelombang 90°, sebesar 3,43 derajat. Probabilitas deck wetness sebesar 0,24% dan bottom slamming sebesar 0.0000000014996%, keduanya telah memenuhi standar NORDFORSK 1987. Kata Kunci: Bottom Slamming ; Deck Wetness; DWT ; Probabilitas; RAO
Co-Authors Abdillah, Riza Abdul Mujib Syadzali Agusty, Cindy Lionita Alamsyah Alamsyah - Anjas Syam, Muhammad Ariani, Vidya Rezeki Arifuddin, Andi Mursid Nugraha Bahri, Irham Cahyani, Alviana Eka Chaerunnisa, Andi Sitti Faisal Mahmuddin Hariyono Hariyono Hariyono Hariyono, Hariyono Ikhwani, Rodlian Jamal Kumandang, Niti Gede Kustiwansa, Harlian Lionita Agusty, Cindy Lumenteri, Fido Fortunatus M. Uswah Pawara Misliah Idrus mubarak, azhar aras Ningrat, Andi Nizam, Syahrul Rachmianty, Andi Raditya, Muhammad Yogi Suandar Baso Suardi Suardi Syahab, Husein Syam, Muhammad Anjas Taufik Hidayat Wahidah, Jusma Wahyu Pratama, Fernanda Wardina Suwedy Wira Setiawan wulandari, amalia ika