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All Journal Bulletin of Community Engagement Jurnal Teknologi dan Manajemen Industri Terapan Jurnal Riset Rumpun Ilmu Teknik (JURRITEK) Jurnal Maritim Malahayati International Journal of Science and Environment Jurnal Penelitian Rumpun Ilmu Teknik Globe: Publikasi Ilmu Teknik, Teknologi Kebumian, Ilmu Perkapalan
Agus Prawoto
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Analysis of Air Quality Problems in the Engine Room Using the USG method Kadek Ceisa Ari Putri Laksmi; Agus Prawoto; Dyah Ratnaningsih; Antonius Edy Kristiyono; Intan Sianturi
International Journal of Science and Environment (IJSE) Vol. 6 No. 2 (2026): May 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i2.481

Abstract

Air quality in a ship's engine room significantly impacts crew health and operational safety, yet the priority of the problem remains underexplored in the Indonesian maritime context. This study analyzes air quality issues in the engine room of KM Sabuk Nusantara 101 using the USG (Urgency, Seriousness, Growth) method. With a quantitative cross-sectional survey design, data were collected through a Likert-scale questionnaire from a purposive sample of 30 engineers (Chief to 4th Engineer) with at least one year of experience in the engine room. The instrument was validated (r_hitung > 0.374) and reliable (Cronbach's α > 0.80) using SPSS. The analysis included descriptive statistics and calculation of USG scores for problem ranking. The results showed gas leaks as the top priority (USG score 13.66), followed by bilge odor (11.56) and increased temperature (11.34). In conclusion, routine seal repair, daily bilge cleaning, and blower optimization are recommended to reduce USG scores by up to 20 percent, improving crew safety and compliance with IMO 2020 regulations.
Analysis of the Effect of Cooling Water Temperature on Thermal Efficiency in the Main Engine of the MV Pritha Lely Widyaningrum; Agus Prawoto; Dyah Ratnaningsih; Antonius Edy Kristiyono; Intan Sianturi
International Journal of Science and Environment (IJSE) Vol. 6 No. 2 (2026): May 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i2.486

Abstract

Main engines in marine diesel vessels require optimal cooling systems to maintain thermal efficiency amid fluctuating operational loads. This study analyzes the effect of coolant temperature on thermal efficiency of the main engine aboard MV Pritha. Employing a quantitative descriptive-analytic approach, data were collected from operational parameters (RPM, inlet/outlet coolant temperatures, fuel oil consumption) during 12-month sea practice (Sep 2024-Jul 2025). The population comprised all engine data at 70-80% stable load; purposive sampling yielded 30-50 daily observations. Instruments included ship-standard thermometers, flow meters, and tachometers, analyzed via simple linear regression (Y = 64.183 - 0.395X), Pearson correlation (r = 0.995), and ANOVA in SPSS. Results revealed significant negative correlation; 1°C coolant increase temperature reduces thermal efficiency by 0.395% (Sig. < 0.001). Conclusions recommend real-time coolant monitoring and routine maintenance to optimize fuel efficiency and engine longevity.
Pengaruh Kerusakan Mechanical Seal terhadap Kinerja Hidraulik Steering Gear di Kapal AHTS Logindo Stamina Ibnu Septian, Wahyu; Antonius Edy Kristiyono; Prima Yudha Yudianto; Agus Prawoto; Wulan Marlia Sandi
JURAL RISET RUMPUN ILMU TEKNIK Vol. 5 No. 2 (2026): : Jurnal Riset Rumpun Ilmu Teknik
Publisher : Pusat riset dan Inovasi Nasional

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55606/jurritek.v5i2.8767

Abstract

The steering gear is a vital component in ship operations, functioning to control the ship’s direction accurately. The reliability of this system highly depends on the performance of the hydraulic system, where the mechanical seal plays a key role in maintaining system pressure and preventing oil leakage. This study aims to identify the main factors causing mechanical seal damage and analyze its impact on the performance efficiency of the steering gear AHTS Logindo Stamina. Qualitative data were obtained through participatory observation and in-depth interviews with the second engineer. Meanwhile, quantitative data were gathered by measuring technical parameters such as oil pressure, operating temperature, and rudder movement time, which were then compared with SOLAS standards. This damage results in oil leakage through the mechanical seal gap, abnormal noise in the hydraulic system, and a significant decrease in working pressure of -25,86%. The operational impacts include the occurrence of steering gear failure alarms, decreased hydraulic efficiency of 25.87%, and the risk of system failure that could endanger ship maneuverability. This study recommends preventive maintenance through oil quality monitoring, environmental condition control in the steering gear room, and periodic mechanical seal replacement in accordance with operational standards to maintaining optimal steering system performance.
Analysis of Fuel Consumption Variation of the 8dkm-28e Main Engine at Stable Performance of 620 RPM in the MV. Tanto Keluarga Nourman Viqry Dwinanda; Agus Prawoto; Shofa Dai Robbi; Monika Retno Gunarti; Novitasari
International Journal of Science and Environment (IJSE) Vol. 6 No. 2 (2026): May 2026
Publisher : CV. Inara in Colaboration with www.stie-sampit.ac.id

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.51601/ijse.v6i2.490

Abstract

This study examines the variation of Heavy Fuel Oil (HFO) fuel consumption of the DAIHATSU 8DKM28e Main Engine at a stable performance condition of 620 RPM on the container ship MV. Tanto Keluarga, amidst the pressure of increasing fuel costs and regulations on maritime efficiency and decarbonization. The study uses a descriptive quantitative approach with a population of all main engine operational data during a certain voyage period and a sample of 5 sheets of Noon Report At Sea at a stable voyage condition in the open sea. The main instrument is the daily noon report that records the main engine speed, turbocharger speed, fuel rack, HFO consumption, and weather and sea conditions, plus ship technical documents and academic literature as secondary instruments. The data analysis technique used is descriptive quantitative analysis, with the calculation of averages, ranges, and trends as well as simple correlation examinations between performance parameters. The results show that HFO consumption varies up to approximately 1,005 liters per day at a relatively stable RPM, with a pattern closely related to changes in fuel rack, turbocharger speed, and sea state and weather conditions. The findings support that the main engine performance condition at 620 RPM is in dynamic equilibrium, so that fuel efficiency assessment needs to integrate internal and external factors simultaneously to support operational management, OPEX reduction, and compatibility with IMO EEXI and CII regulations.
Co-Authors Adiisty Nur Fadilla Alia, Diana Antonius Edy Kristiyono Daffa Raihan Pradana Dirhamsyah Dirhamsyah Dirhamsyah Diyah Purwitasari Dyah Ratnaningsih Elise Dwi Lestari Elly Kusumawati Faris Nofandi Frenki Imanto Hidayat, Rochmad Ibnu Septian, Wahyu Ihsanul Muqorrobin Imam Sutrisno Indah Cahyaning Surya Intan Sianturi Kadek Ceisa Ari Putri Laksmi Laso Alfasa Yusuf Lely Widyaningrum Monika Retno Gunarti Muh. Darwis Nasution, Farika Nourman Viqry Dwinanda NOVITASARI Perwi Darmajanti Prima Yudha Yudianto Putri, Indah Ayu Johanda Rahajeng Galih Ayu Putri Basuki Rahmawati, Maulidiah Reza Putra Susanto Shofa Dai Robbi Siti Fatimah Trisnowati Rahayu Wulan Marlia Sandi