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All Journal International Journal of Science and Environment
Monika Retno Gunarti
Surabaya Maritime Polytechnic Applied Undergraduate Study Program Ship Machinery Engineering Technology, Indonesia
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Mathematics Physics

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The Influence of The Chief Engineer's Leadership Style on The Performance of Crew Members in The Engine Room Agraprana Rafasya; Monika Retno Gunarti; Elly Kusumawati; Shofa Dai Robbi; Agus Prawoto
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 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.v6i1.439

Abstract

Human resource management in ship engine rooms faces challenges such as low productivity and high turnover due to the ineffective leadership style of the chief engineer. This study aims to analyze the influence of the chief engineer's leadership style on the performance of crew members (ABK) in the engine room. Using a quantitative explanatory approach with a descriptive survey design, the population includes all crew members in the engine room of the marine practice ship Polytechnic of Shipping Surabaya, with a sample of 35 respondents through purposive sampling. The Likert scale questionnaire instrument (1-5) was analyzed using SPSS for descriptive statistics, validity/reliability tests, simple linear regression, t-test, and R². The results showed a significant positive effect (t-count 5.370 > t-table 2.034; sig. 0.000), with R² 0.450 which means leadership explains 45% of the performance variation. The conclusion states that chief engineers need to implement proactive leadership to improve shipping efficiency and safety.
The Effect of Injector Performance on Exhaust Gas Temperature Diesel Generator Engine on Ship Muhamad Fikri Supriatmana; Nasri; Wulan Marlia Sandi; Monika Retno Gunarti; Intan Sianturi
International Journal of Science and Environment (IJSE) Vol. 6 No. 1 (2026): February 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.v6i1.444

Abstract

Injectors play a crucial role in optimal combustion of marine diesel generator engines, but their performance degradation often causes exhaust gas temperature fluctuations that reduce efficiency and operational reliability. This study aims to analyze the effect of injector performance on exhaust gas temperature on the SV. STELLA 28 vessel. Using a causal descriptive quantitative approach, the population is operational data of Auxiliary Engine 1 and 2 for 12 months, with a purposive sample of 70 observations. Instruments include injector maximum pressure (PMAX) measurements and exhaust gas temperature thermocouples, analyzed through the Kolmogorov-Smirnov normality test, simple linear regression, and SPSS. The results show a significant effect (Sig. 0.000) with R² 0.417 and the equation . The conclusion states that optimal injector performance stabilizes exhaust gas temperature, supporting condition-based maintenance.
Co-Authors Agraprana Rafasya Agus Prawoto Elly Kusumawati Intan Sianturi Muhamad Fikri Supriatmana Nasri Shofa Dai Robbi Wulan Marlia Sandi