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All Journal EPI International Journal of Engineering International Journal of Marine Engineering Innovation and Research 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) WAVE: Jurnal Ilmiah Teknologi Maritim
Chris Jeremy Verian Sitorus
Department Of Naval Architecture, Department Of Naval Architecture, Institut Teknologi Kalimantan, Balikpapan, 76127, Indonesia
Automotive Engineering Civil Engineering, Building, Construction & Architecture Computer Science & IT 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

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Maximum Stress Analysis on Ship Anchor Chains with Various Force Angles Chris Jeremy Verian Sitorus; Luluh Wardah; Alamsyah; Suardi; Andi Mursid Nugraha Arifuddin; Samsu Dlukha Nurcholik; Hariyono; Jusma Wahidah; Harlian Kustiwansa; Ahmad Azwar Mas`ud M
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 19 No. 1 (2025)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2025.11611

Abstract

One of the components of ship fittings is the anchor chain. Usually, when the anchor is moored, it is not always positioned perpendicular to the ship’s hull; instead, it often forms an angle between the chain and the hull. Due to environmental influences or excessive tension occurring at certain angles, there have been cases of anchor chains breaking. Therefore, it is necessary to conduct a maximum stress analysis of the ship’s anchor chain with varying force angles to determine the maximum stress experienced by the chain. This research focuses on the anchor chain of the Tug Boat Marina 2435 and utilizes ANSYS Workbench for finite element analysis. In this research, the chain is suspended from the hawse pipe with a diameter of 19 mm, and the loading on the anchor chain is static, consisting of the weight of the chain and the anchor. The angles analyzed are 30°, 35°, 40°, 45°, 50°, 55°, and 60°. The maximum stress on the anchor chain was observed at an angle of 35°, with a value of 6.9943 MPa. The stress at each angle remained below the ultimate tensile strength of the material, which is 515 MPa.
Technical and Operational Analysis of Marine Airbag-Assisted Ship Docking Puspa Ningrum, Ainun Chandra; Yusril Syam, Muh; Maulidah, Hikmah; Wahidah, Jusma; Jeremy Verian Sitorus, Chris
Indonesian Journal of Maritime Technology Vol. 3 No. 2 (2025): Volume 3 Issue 2, December 2025
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

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

Abstract

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.
Perancangan Floating Barge Stasiun Pengisian Bahan Bakar Nelayan (SPBN) sebagai Optimalisasi Distribusi BBM di Wilayah Pesisir Penajam Paser Utara Ismail, Hariyono; Alamsyah; Suardi; Syahab, Husein; Verian Sitorus, Chris Jeremy
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 19 No. 2 (2025)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2025.13430

Abstract

Distribusi bahan bakar minyak (BBM) bagi nelayan di wilayah pesisir Penajam Paser Utara mengalami berbagai kendala, seperti keterbatasan infrastruktur, aksesibilitas yang rendah, dan tingginya biaya logistik. Konsep Floating Barge Stasiun Pengisian Bahan Bakar Nelayan (SPBN) menjadi solusi inovatif yang berfungsi sebagai fasilitas terapung dan mudah diakses oleh kapal nelayan. Hasil survei menunjukkan adanya peningkatan signifikan jumlah penduduk dari 161.000 jiwa pada tahun 2019 menjadi hampir 200.000 jiwa pada tahun 2024, yang berdampak pada meningkatnya permintaan ikan dan aktivitas nelayan. Desain floating barge yang dikembangkan memiliki ukuran utama panjang 12 m, lebar 6 m, tinggi 1,55 m, dan draft 0,65 m, serta dilengkapi dua tangki berkapasitas 46ton BBM dan dua dispenser pengisian. Analisis hidrodinamika dan seakeeping menunjukkan bahwa ponton memiliki stabilitas yang baik pada berbagai kondisi gelombang, dengan nilai RMS heave tertinggi 0,2465 m, pitch 0,9528°, dan roll 3,3594° pada gelombang setinggi 1 meter. Hasil analisis stabilitas memperlihatkan GMt awal 2,217 m dengan lengan tegak maksimum 0,398 m pada sudut kemiringan 30°, yang memenuhi standar keamanan operasi. Dengan spesifikasi ini, floating barge SPBN diharapkan mampu meningkatkan efisiensi distribusi BBM, mengurangi ketergantungan terhadap SPBU darat, serta mendukung produktivitas sektor perikanan dan kesejahteraan nelayan secara berkelanjutan.
Assessment of Engine Performance and Emissions Using Palm Oil–Banana Peel Biodiesel Blend in CI Engines Suardi; Faisal Mahmuddin; Chris Jeremy Verian Sitorus; Hariyono; Muhammad Uswah Pawara; Hijriah; Harlian Kustiwansa; Muhammad Zainal
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

The global need for renewable energy has encouraged the use of biodiesel from organic waste as an alternative to hydro-carbon fuels. This study focuses on evaluating the performance of a CI diesel engine using a fuel blend made from palm oil and banana peel oil. The objective is to determine the optimal blend in terms of fuel properties, engine performance, and exhaust emissions. The biodiesel is produced using the transesterification method for palm oil and a heating extraction process for banana peel oil. Engine tests are carried out on a Yanmar TF85-ME single-cylinder diesel engine using three fuel types: B0 (Dex-lite), BBO-30 (30% banana peel oil and biodiesel), and BBO-50 (50% blend). Fuel characterization showed that BBO-50 had the highest viscosity (4.23 cSt) and density (925 kg/m³), while BBO-30 had the highest calorific value (45.1 MJ/kg). Performance testing revealed that BBO-30 achieved the highest torque (7.26 Nm), lowest SFC (367.4 g/kWh), and highest thermal efficiency (22.4%). Emission tests showed that BBO-50 produced the lowest CO and NOx emissions, while BBO-30 had the highest CO2 emis-sion, indicating more complete combustion. Based on these results, BBO-30 is recommended for optimal engine efficiency, while BBO-50 is more suitable for lower emissions.
Design of water Ambulance for Improving Healthcare Services in Mahakam Ulu Regency Chris Jeremy Verian Sitorus; Muhammad Uswah Pawara; Rahmat Hidayat; Hariyono; Harlian Kustiwansa; Alamsyah; Suardi; Muhammad Anjas Syam; Jusma Wahidah; Cindy Lionita Agusty
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

Mahakam Ulu Regency's landscape is dominated by tropical rainforest, with transportation access heavily reliant on river routes. The region is home to 245 rivers, ten of which are classified as major rivers and are distributed across all sub-districts. The Mahakam River serves as the main artery for community activities, including the emergency transport of patients. Nevertheless, serious challenges persist due to limited healthcare infrastructure and inadequate medical transport, which hinder the timely treatment of patients. Currently, there are no water ambulances specifically designed for emergency medical services, leading to delays and increased risks of patient morbidity and mortality.The aim of this study is to develop a water ambulance vessel designed to serve as a dedicated river based medical transport in Mahakam Ulu. A parent ship design approach was applied in the development process. The principal dimensions defined in this study are as follows:Length Overall (LOA): 10.5 m,Beam (B): 3.15 m, Depth (H): 1.35 m, Draft (T): 0.65 m, Service Speed (Vs): 20 knots, Accommodation: 10 crew and passengers. Keywords- Mahakam Ulu, Mahakam River, Water Ambulance, Parent Ship Design
Probabilistic Evaluation of Seawall Performance Against Wave Run-Up and Overtopping Under Variable Water Levels at Serui Fuel Terminal Mas'ud M, Ahmad Azwar; Paotonan, Chairul; Sitorus, Chris Jeremy Verian; Al Hakim, Muhammad Abdul Ghofur
Maritime Park: Journal of Maritime Technology and Society Volume 5, Issue 1, 2026
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.48184

Abstract

Seawalls are one of the coastal protection structures commonly used to reduce the risk of wave overtopping, especially in critical coastal infrastructure. At the Fuel Terminal in Serui, overtopping events have been recorded causing damage to several facilities, even under moderate wave conditions. This study evaluates the performance of the existing seawall under the combined influence of probabilistic waves (H2%, H10%, H33%) and sea level variations (MSL and HWL). A 20-year wave dataset (2002–2021) obtained from ECMWF was statistically analyzed, followed by theoretical wave transformation toward the shoreline. Wave run-up was calculated based on the Iribarren-type formulation and empirical equations, in which the 2% exceedance run-up (R2%) was estimated using the probabilistic extreme wave height (H2%) following established empirical correlations for smooth seawalls. Overtopping discharge was estimated using an exponential formula and compared with established overtopping impact classifications. Results indicate that under High Water Level (HWL) conditions, all run-up values exceeded the seawall crest elevation (+1.93 m relative to MSL), with R2% reaching 3.3 m and a maximum overtopping discharge of 92 l/s/m, corresponding to a high functional damage risk. Wave overtopping does not compromise the structural integrity of the seawall but can cause significant functional damage to facilities and operation behind the wall. Even under MSL conditions, overtopping still occurred for extreme wave conditions (H2%), These results are consistent with field observations in 2020, confirming that the existing seawall geometry and smooth surface contribute to limited wave energy dissipation. Unlike conventional deterministic assessments, this study introduces a probabilistic and field-validated evaluation framework that integrates run-up and overtopping analysis under varying water levels, providing a more realistic basis for assessing seawall performance for future adaptive redesign strategies.
Conceptual and Preliminary Design Innovation of a Multipurpose Palm Fruit Vessel for Inland Plantation Waterways in Muara Kaman Suardi, Suardi; Jamal, Jamal; Irmandana, Arwis; Alamsyah, Alamsyah; Setiawan, Wira; Jeremy Verian Sitorus, Chris; Wahidah, Jusma; Lionita Agusty, Cindy; Mahmuddin, Faisal
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8481848

Abstract

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.
Bottom Slamming ; Deck Wetness; Analisis Dinamika Kapal Ikan Berlambung Katamaran terhadap Fenomena Bottom Slamming dan Deck Wetness Sitorus, Chris Jeremy Verian; Setiawan, Wira; Alamsyah; Anjas Syam, Muhammad; Agusty, Cindy Lionita; 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

The lack of consideration for safety in fishing boat design, as builders primarily focused on maximizing catch. It was necessary to calculate deck wetness and bottom slamming to prevent dangerous conditions in rough weather. This study aimed to determine the RAO values of a catamaran fishing boat at wave angles of 0°, 90°, 135°, and 180°, and to calculate the probability of bottom slamming and deck wetness. The RAO calculation used an optimization method with Maxsurf software for load variations of 25% DWT, 50% DWT, and 100% DWT. The results showed that the highest heave amplitude occurred at 100% DWT, 6.45 knots, and a 0° wave angle, measuring 0.131 meters. The highest pitch amplitude was 2.02 degrees under the same conditions, while the highest roll amplitude occurred at 50% DWT, 6.45 knots, and a 90° wave angle, reaching 3.43 degrees. The probability of deck wetness was 0.24%, and bottom slamming was 0.0000000014996%, both meeting NORDFORSK 1987 standards.
Co-Authors Abdillah, Riza Agusty, Cindy Lionita Ahmad Azwar Mas`ud M Al Hakim, Muhammad Abdul Ghofur Alamsyah Alamsyah Alamsyah Alamsyah - Andi Mursid Nugraha Arifuddin Andi Rachmianty Anjas Syam, Muhammad Ariani, Vidya Rezeki Arifuddin, Andi Mursid Nugraha Azhar Aras Mubarak Bahri, Irham Cahyani, Alviana Eka Chaerunnisa, Andi Sitti Chairul Paotonan Cindy Lionita Agusty Cindy Lionita Agusty Faisal Mahmuddin Faisal Mahmuddin Ferdian Pasha Anwar Hariyono Hariyono Hariyono Hariyono Hariyono Ismail Hariyono, Hariyono Harlian Kustiwansa Harlian Kustiwansa Harlian Kustiwansa Harlian Kustiwansa Hijriah Ikhwani, Rodlian Jamal Irmandana, Arwis Ismail, Hariyono Jamal Jamal Jusma Wahidah Jusma Wahidah Kumandang, Niti Gede Kustiwansa, Harlian Lionita Agusty, Cindy Luluh Wardah Lumenteri, Fido Fortunatus M. Uswah Pawara Mas'ud M, Ahmad Azwar Maulidah, Hikmah Misliah Idrus mubarak, azhar aras Muhammad Anjas Syam Muhammad Zainal Ningrat, Andi Nizam, Syahrul Puspa Ningrum, Ainun Chandra Raditya, Muhammad Yogi Rahmat Hidayat Samsu Dlukha Nurcholik Suandar Baso Suardi Suardi Suardi Suardi Suardi Syahab, Husein Syam, Muh Yusril Syam, Muhammad Anjas Wahidah, Jusma Wahyu Pratama, Fernanda Wardina Suwedy Wira Setiawan wulandari, amalia ika