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All Journal Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Jurnal Bakti Masyarakat Indonesia LEBAH Indonesian Journal of Maritime Technology or abbreviated (ISMATECH) Applied Science and Technology on Naval Engineering
Fakhri Akbar Ayub
Universitas Pembangunan Nasional Veteran Jakarta
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PELATIHAN PEMBUATAN ZONA LAMBUNG PERAHU IKAN FIBERGLASS SKALA KECIL PADA DESA PABEAN UDIK KECAMATAN INDRAMAYU Amir Marasabessy; Fajri Ashfi Rayhan; Fakhri Akbar Ayub; Wiwin Sulistyawati; Rusdy Hatuwe
Jurnal Bakti Masyarakat Indonesia Vol. 6 No. 1 (2023): Jurnal Bakti Masyarakat Indonesia
Publisher : Lembaga Penelitian dan Pengabdian kepada Masyarakat, Universitas Tarumanagara

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24912/jbmi.v6i1.21875

Abstract

Fishermen group from Pabean Udik village, Indramayu, have problems with the maintenance of wooden boat hulls. Limitations of wood resources and the management of ships owned by skippers are a source of problems for fishermen in the Pabean Udik village. The objective of this project is to provide education and training for the manufacture of small-scale fiberglass fish boat hull for fishermen in Pabean Udik village. Iit was an effort to empower the fishing village community of Pabean Udik village to be able to make fiberglass fishing boats independently, as well as a transition from using fishing boats made of wood to fiberglass. The methods used were semi-permanent moulded and hand laid-up. In this case, the mat and roving layers are laminated using a hand brush or roll brush. This activity process involved a team of lecturers, students of Universitas Pembangunan Nasional Veteran Jakarta, practitioners and 10 fishermen from the village of Pabean Udik.The results of this work were the hull products of small-scale fish boats made of fiberglass with dimensions of length (P) = 1.0 m, width (B) = 0.5 m, and height (H) = 0.3 m. The conclusion of this study was that the fishing community of Pabean Udik village got new insights into the manufacture of fiberglass-based fishing boats. Therefore, in the future, the fishing community of Pabean Udik village can produce their own fishing boats with fiberglass.
Akselerasi literasi digital untuk mengurangi dampak negatif gadget dengan penerapan modul pembelajaran digital di Balai Warga RT 01 RW 01 Depok Jaya Pancoran Depok Zuchriadi, Achmad; Akbar Ayub, Fakhri; Widyanto, Didit; Krisnawati, Luh; Ladesvita, Fiora; Adryan, Raka; Ramadhoni
Lebah Vol. 19 No. 1 (2025): September: Pengabdian
Publisher : IHSA Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35335/lebah.v19i1.388

Abstract

Peningkatan penggunaan gadget di kalangan anak-anak telah menimbulkan masalah seperti rendahnya literasi digital dan ketergantungan pada konten non-edukatif. Kegiatan pengabdian ini bertujuan mengatasi hal tersebut melalui penerapan Teknologi Tepat Guna (TTG) berupa sistem pembelajaran digital berbasis intranet tanpa kuota internet. Kegiatan dilakukan di RW 01 Depok Jaya dengan pendekatan partisipatif, meliputi survei, analisis, desain, instalasi, pelatihan, dan pendampingan. Sistem terdiri atas perangkat keras, aplikasi edukatif ramah pengguna, dan konten pembelajaran formal maupun informal. Hasil menunjukkan sistem digunakan oleh anak dan remaja serta mengubah fungsi balai warga menjadi pusat belajar digital. Antusiasme masyarakat tinggi, disertai permintaan untuk menambahkan konten pembelajaran non formal agar pengguna sistem bertambah ibu rumah tangga dan remaja yang sering berkegiatan di lokasi. Inisiatif ini mendukung literasi digital anak serta SDGs poin 4. Rekomendasi mencakup pengembangan sistem kendali jarak jauh, penambahan konten, dan replikasi ke wilayah lain.
Development of a Platform Supply Vessel: Design, Resistance Assessment, and Prototype Fabrication for Offshore Operations in Natuna, Indonesia Fathin Muhammad Mahdhudhu; Fakhri Akbar Ayub; Muhammad Akmal Apriansyah Efendy; Muhammad Ivan Kurniawan; Choirul Anam; Fathan Mubina Denu; Nabillah Jasmine Anugrahputri
Jurnal Asiimetrik: Jurnal Ilmiah Rekayasa Dan Inovasi Volume 8 Number 1 (2026)
Publisher : Fakultas Teknik Universitas Pancasila

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35814/asiimetrik.v8i1.8994

Abstract

Maritime transportation serves as a vital component of inter-island connectivity in Indonesia, particularly in supporting offshore oil and gas exploration activities. This study focuses on addressing the rarity of Platform Supply Vessel in the Natuna Islands, which are needed to support offshore operations to optimize the exploration of Natuna's abundant natural resources. The design process begins with the determination of the vessel’s principal dimensions, derived from benchmark vessel data and dimensional ratio analysis. The hull form is subsequently developed into a 3D model to produce a lines plan. Resistance analysis is conducted based on the Holtrop method, encompassing components such as frictional resistance, wave-making resistance, transom drag, and air resistance. A scaled physical model is also constructed using a non-molded hull fabrication technique to validate the design. The findings indicate that the proposed hull design satisfies the specified performance criteria and demonstrates favorable resistance characteristics. This research answers the rarity of studies on Platform Supply Vessel specifically for Natuna by contributing a comprehensive study focusing on design, fabrication, and cost analysis.
Studi Dampak Perairan Dangkal terhadap Gaya Lateral (Sway Force) dan Momen Berputar (Yaw Moment) Kapal Rico; Fakhri Akbar Ayub
Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v3i2.11786

Abstract

This study investigates the influence of restricted waters on the sway force (Y’H) and yaw moment (N’H) acting on a ship. We performed simulations using Computational Fluid Dynamics (CFD) on a 1:40 scale KRISO Container Ship (KCS) model, varying ship speed, water depth (1.3T and 1.6T), and drift angle (2°–10°). The simulation results indicate that both Y’H and N’H increase significantly as the water becomes shallower and the drift angle becomes larger. This phenomenon is attributed to the pressure imbalance around the ship's hull, caused by flow confinement. These findings are anticipated to provide valuable insights for safer and more efficient ship maneuvering, especially in narrow and shallow waterways. Keywords: restricted waters; bank effect; sway force; yaw moment; CFD
Optimalisasi Efisiensi Turbin Arus Laut Horizontal untuk Mendukung Kebutuhan Energi di Kawasan Pesisir Larantuka Indana Zulfatun Nikmah; Fakhri Akbar Ayub
Applied Science and Technology on Naval Engineering Vol 3 No 2 (2025)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v3i2.11789

Abstract

This study aims to evaluate the energy conversion efficiency of Horizontal Axis Tidal Turbines (HATT) by varying blade length and angle of attack (AoA), and to assess their potential application in the coastal region of the Larantuka Strait. Numerical simulations were performed using Computational Fluid Dynamics (CFD) across nine turbine configurations to determine torque and power coefficient (Cp). The turbine with a 1 m blade and 10° AoA achieved the highest Cp value of 0.68. Meanwhile, the turbine with a 2 m blade and the same AoA, despite having a slightly lower Cp (0.66), produced the highest annual energy output of 737,619.7 kWh. With a net power output of 140.65 kW, approximately four units of this turbine are required to supply around 10% of Larantuka’s annual electricity demand. The selection of the optimal turbine model is based on a multi-objective approach that balances efficiency and energy output. These findings highlight the strong potential of tidal turbines as a renewable energy solution in eastern Indonesian coastal areas.
Ship Manuvering Analysis Using Virtual Captive Model Test On Trim And Sinkage Variations Audi Razif Santoso; Fakhri Akbar Ayub
Applied Science and Technology on Naval Engineering Vol 4 No 2 (2026)
Publisher : Fakultas Teknik UPN Veteran Jakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.54378/astne.v4i2v2.05

Abstract

This study evaluates the effect of trim and sinkage variations on ship hydrodynamic characteristics using the Virtual Captive Model Test (VCMT) based on Computational Fluid Dynamics (CFD) for the KRISO Container Ship (KCS) model. Simulations were conducted for sinkage variations of −0.00090, −0.00275, and −0.00599 and trim variations of 0.017°, 0.053°, and 0.097°, over drift angles ranging from 2° to 10° under two speed conditions represented by Froude numbers 0.152 and 0.163. The objective is to investigate the influence of trim and sinkage on lateral force (sway) and yaw moment and to determine hydrodynamic coefficients using the Least Squares regression method. The results show that trim and sinkage influence sway force and yaw moment, although their effects are smaller than those of speed and drift angle. Increased sinkage generally produces higher sway force and yaw moment due to increased wetted surface area and changes in hull pressure distribution, while trim mainly alters the longitudinal pressure distribution with relatively limited influence within the investigated range. The maximum nondimensional values of Y′ and N′ were obtained at Fr = 0.163 and a drift angle of 10° (Y′H = 0.206543 and N′H = 0.079192 for sinkage variation; Y′H = 0.202338 and N′H = 0.073965 for trim variation). The hydrodynamic forces and moments were nondimensionalized using the Yoshimura–Masumoto formulation and analyzed through Least Squares regression, yielding coefficients that agree well with the simulation results. The VCMT-based CFD approach combined with Least Squares regression provides an effective alternative for determining ship maneuvering hydrodynamic coefficients.
The Effect of Nickel Ore Liquefaction on Ship Stability Fakhri Akbar Ayub; Fanny Darwani Putri
Indonesian Journal of Maritime Technology Vol. 4 No. 2 (2026): Volume 4 Issue 2, December 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i2.8482228

Abstract

Nickel ore liquefaction poses a critical threat to vessel stability because the cargo may transition from a solid to a fluid state, potentially causing rapid heeling and, ultimately, sinking. Under a substantial external shock, liquefied cargo may fail to return to its original position, thereby altering the cargo distribution and adversely affecting vessel stability and motion. Accordingly, this study investigates the effects of varying proportions of solid and liquid nickel ore, with the combined composition maintained at 100%, on the stability and motion characteristics of the MV Nur Allya. Five loading conditions were considered: 100% solid, 75% solid–25% liquid, 50% solid–50% liquid, 25% solid–75% liquid, and 100% liquid. Among these conditions, Case 1 produced the most favourable stability performance, with a maximum righting arm (GZ) of 1.064 m. To further mitigate the liquefaction hazard, a longitudinal bulkhead was incorporated into the cargo hold for all five loading cases. The results show a modest improvement in stability between Case 1 and Case 5 following the installation of the bulkhead. However, although the longitudinal bulkhead reduces the stability risks associated with cargo liquefaction, its installation also decreases the cargo-carrying capacity of the vessel, highlighting a trade-off between enhanced safety and cargo utilization.
Co-Authors Achmad Zuchriadi Adryan, Raka Amir Marasabessy Audi Razif Santoso Choirul Anam Fajri Ashfi Rayhan Fanny Darwani Putri Fathan Mubina Denu Fathin Muhammad Mahdhudhu Fiora Ladesvita Indana Zulfatun Nikmah Krisnawati, Luh Muhammad Akmal Apriansyah Efendy Muhammad Ivan Kurniawan Nabillah Jasmine Anugrahputri Ramadhoni Rico Rusdy Hatuwe Widyanto, Didit Wiwin Sulistyawati