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All Journal JAM Journal of Research and Technology Journal Technology and Implementation Bussines Surya Abdimas Jurnal Entrepreneur dan Entrepreneurship (JEE) International Journal of Marine Engineering Innovation and Research Journal of Soft Computing Exploration Zona Laut : Jurnal Inovasi Sains dan Teknologi Kelautan Jurnal Teknologi dan Manajemen Jurnal Locus Penelitian dan Pengabdian Procedia of Social Sciences and Humanities Jurnal Pengabdian Mitra Masyarakat (JPMM) Jurnal Teknologi Maritim Proceeding Maritime Business Management Conference WAVE: Jurnal Ilmiah Teknologi Maritim
Fitri Hardiyanti
Politeknik Perkapalan Negeri Surabaya
Aerospace Engineering Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Decision Sciences, Operations Research & Management Economics, Econometrics & Finance Education Electrical & Electronics Engineering Energy Engineering Environmental Science Industrial & Manufacturing Engineering Materials Science & Nanotechnology Mathematics Mechanical Engineering Medicine & Pharmacology Physics Social Sciences Transportation Other

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ANALISIS PENGARUH IDLE TIME DAN NOT OPERATION TIME TERHADAP PRODUKTIVITAS BONGKAR MUAT (BSH) PADA DERMAGA INTERNASIONAL PERUSAHAAN BONGKAR MUAT DI SURABAYA Alfina Cintika Putri; Fitri Hardiyanti; Alfred Bawole
Proceeding Maritime Business Management Conference MBMC: Proceeding Maritime Business Management Conference 2024
Publisher : Program Studi D4-Manajemen Bisnis, Jurusan Teknik Bangunan Kapal, Politeknik Perkapalan Negeri Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33863/mbmc.v3i1.3236

Abstract

The productivity of container loading and unloading at the dock is influenced by the utilization of time, including both idle time and not operation time. The productivity of a dock is also a benchmark for determining the success of loading and unloading activities. High idle time and not operation time have disrupted the productive activities of the dock. The high ineffective time results in many ships having to dock longer than planned. This study aims to analyze the impact of idle time and not operation time on loading and unloading productivity (BSH), specifically at the international dock of a stevedoring company in Surabaya. This research uses a quantitative method with data from December 2023. The data collection method used is documentation of internal company data from the stevedoring company in Surabaya. The sampling method used is saturated sampling with a total sample of 85 ships. The analysis methods used in this research are descriptive analysis and multiple linear regression analysis. The results of this study show that the idle time variable has a positive and significant impact on loading and unloading productivity (BSH). In contrast, the not operation time variable does not have a substantial effect on loading and unloading productivity (BSH). Additionally, idle time and not operation time have a simultaneous significant impact on loading and unloading productivity (BSH)
Study of Design and Implementation of 3D Printing in FRP Shipbuilding Mustika Ningrum; Fitri Hardiyanti; Heri Supomo
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.2025.432

Abstract

3D Printing is becoming a more reliable and professional manufacturing method. The benefits of additive manufacturing such as design optimization, weight reduction, and ease of prototyping are factors that speed up the 3D printing process. Although further research on 3D printing is still needed, in some specific applications, 3D printing can be useful. The maritime industry still uses conventional technology in shipbuilding. In addition, shipbuilding has to face very high classification requirements that compel the use of technology that ensures repeatability and high quality. The factor of the length of the process is due to difficulties in the raw materials for shipbuilding. Fiberglass is an alternative basic material for shipbuilding with sufficient material availability, relatively cheap prices, light weight, and more flexibility in catching fish. Fiberglass boats have a longer service life, corrosion resistant, light weight, low production and maintenance costs, and effectively increase fishing. The difficulty of the conventional method of hand lay-up and vacuum infusion in the construction of fiberglass boats is due to the difficulty of determining the composition of the material, as well as the emergence of air bubbles which causes a decrease in the strength of the ship. So the chopper gun method is an efficient method. This research provides information about current R&D in the field of 3D Printing application in shipbuilding, especially ships made of Fiberglass, possible benefits, methods, materials, and opportunities.
Analysis of Performance Losses Related to Shaft Angle on Fishing Boats Using the Free Running Model Test Method Aang Wahidin; Rachmad Tri Soelistijono; Fitri Hardiyanti; Lilik Subiyanto; Gaguk Suhardjito; Subagio So’im
International Journal of Marine Engineering Innovation and Research Vol. 8 No. 2 (2023)
Publisher : Department of Marine Engineering, Institut Teknologi Sepuluh Nopember

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j25481479.v8i2.5466

Abstract

Several traditional fishing boats in Sendang Biru, Malang Regency are of the sekoci type using an inboard engine drive system with the position of the propeller shaft installed at an angle to the ship's base line. Based on the theory can reduce the performance of the ship propulsion system up to (2-3)%. In this research, we analyzed how much performance was lost/decreased on the lifeboat type fishing boats installed above. The method we use is the Free Running Model Test by making a model of a traditional fishing boat type of lifeboat with a model size of Loa = 100 cm, Lwl = 80.72 cm, B = 19.7 cm, H = 10.68 cm and T = 5, 08 cm made of aluminum sheet. The Free Running Model Test uses 1 motor and propeller which has a thrust of 60 watts, remote control equipment uses the main component of the NRF24L01 transceiver which works at a frequency of 2.4 Ghz with a range of 240 meters to 1 kilometer with conditions without obstacles and camera equipment drone to record the track. The results of this study show that there is a decrease/loss of performance at a 3-degree angle of 0.24%, at a 5-d. gree angle of 0.49%, at a 10-degree angle of 2.52%, at a 15-degree angle of 4.41% and at an angle of 20 degrees of 6.48%.
Comparison of Resistance Values for Various Patrol Vessel Step Hull Geometry Variations Using Computational Fluid Dynamics (CFD) Fitri Hardiyanti; Agung Prasetyo Utomo; Athallah Bintang Rahagi; I Putu Arta Wibawa; Desi Tri Cahyaningati; Aang Wahidin; Miftachuddin
Zona Laut : Jurnal Inovasi Sains Dan Teknologi Kelautan Volume 7, Issue 1, March 2026 Edition
Publisher : Departemen Teknik Kelautan Universitas Hasanuddin

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.62012/zl.vi.47994

Abstract

-Abstract This study investigates the effect of stepped hull geometry variations on the hydrodynamic resistance of a patrol vessel operating in Morowali waters. Computational Fluid Dynamics (CFD) simulations were conducted to evaluate the resistance performance of an existing hull and eight stepped hull configurations at an operating speed of 30 knots. The parameters investigated include step spacing, spray strip angle, and spray strip configuration. The results demonstrate that the application of stepped hull geometry generally reduces total resistance compared to the baseline hull. The optimal configuration, Model S3 with a 1.0 m step spacing and a 60° spray angle, achieved the lowest resistance of 28,384.1 N, corresponding to a reduction of 7.34%. From an engineering perspective, this reduction is significant, as lower resistance directly contributes to improved fuel efficiency, extended operational range, and enhanced endurance of patrol vessels during maritime surveillance operations.
Development of A Framework for Mitigating Cost and Time Overruns in The V25 Ambulance Ship Construction Project using The ISM and ANP Approaches Hamidah Zulfa Sarah; Silvianita Silvianita; Fitri Hardiyanti
Jurnal Locus Penelitian dan Pengabdian Vol. 5 No. 10 (2026): JURNAL LOCUS: Penelitian dan Pengabdian (Issue in Progres)
Publisher : Riviera Publishing

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58344/locus.v5i10.6216

Abstract

This study aimed to develop a framework for mitigating cost and schedule overruns through the integration of Interpretive Structural Modeling (ISM) and the Analytic Network Process (ANP). Data were obtained from project documentation and questionnaires administered to five experts who assessed six factors and 23 internal subfactors contributing to cost and schedule deviations. ISM was used to analyze hierarchical relationships, driving power, and dependence power, while ANP was used to construct a priority network for nine subfactors in the independent quadrant. The final priorities were derived from five subfactors (A1–A5), while A6–A9 served as control nodes within the dependency relationships. The ISM results showed that unrealistic cost planning (A6) was positioned at the most fundamental level and had the highest driving power, identifying it as a key strategic driver. The ANP results indicated that inadequate communication and coordination among relevant parties (A1) had the highest global weight of 0.348180, followed by an insufficient number of workers (A2) at 0.258313 and excessive workload (A4) at 0.172153. The integration of the two methods indicated that A6 should be addressed during the planning stage, whereas A1 should be the primary operational priority during project implementation. This study developed a cyclical mitigation framework comprising priority risk identification, mitigation implementation, monitoring, effectiveness evaluation, residual risk assessment, and decision-making. The framework was supported by early mitigation measures, a Responsible, Accountable, Consulted, and Informed (RACI) matrix, monitoring indicators, evaluation frequency, and escalation mechanisms to strengthen cost and schedule control in similar shipbuilding projects.
Co-Authors Aang Wahidin Aang Wahidin Achmad Rifqi Nu’man Adhi Setiawan Adhitya, Ryan Yudha Aditya Maharani Aditya Maharani Afianto, Afif Zuhri Agung Prasetyo Utomo Agus Khumaidi Agus Khumaidi Ahmad Erlan Afiuddin Ahmad Erlan Afiuddin Akmal Syarofi Jauhar Akseptori, Ristanti Alfina Cintika Putri Alfred Bawole ALI SUBAGYO Annas Singgih Setiyoko Arie Indartono Arif, Muhammad Lukman Arninputranto, Wibowo Athallah Bintang Rahagi Aulia Nadia Rachmat Beauty, Nur Lailany Fenny Budi Prasojo Budiawati, Ratna Desi Tri Cahyaningati Desynta, Finda Devi, Yesica N Devina Puspitasari Devina Puspitasari Farizi Rachman Fitria Wahyuni Gaguk Suhardjito Gaguk Suhardjito Hamidah Zulfa Sarah Hamidah Zulfa Sarah Hasin, Muhammad Khoirul Hendro Agus Widodo, Hendro Agus Heri Supomo I Putu Arta Wibawa Ikhsaniyah Putri Mulyono Imam Khoirul Rohmat Indra Komara, Indra Irma Rustini Aju Joko Endrasmono Lilik Subiyanto Lilik Subiyanto Lilik Subiyanto Linsy Shafa Kamila Mey Rohma Dhani Miftachuddin Mirna Apriani Mochamad Yusuf Santoso Mustika Ningrum Nilna Faizah Madaniah Puspitasari, Devina Putri Marthasari Rahmawati, Nanda Putri Rinanto, Noorman Setiani, Vivin Silvianita Silvianita Soelistijono, Rachmad Tri Subagio So’im Vivin Setiani Vivin Setiani Yesica Novrita Devi