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INDONESIA
KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan
Published by Universitas Diponegoro
ISSN : 18298370     EISSN : 23019069     DOI : 10.14710/kapal.
Core Subject : Science,
Earth & Planetary Sciences
Jurnal ini merupakan Jurnal Ilmiah untuk mengembangkan ilmu dibidang Ilmu Pengetahuan & Teknologi Kelautan. Jurnal ini diterbitkan oleh Teknik Perkapalan Universitas Diponegoro 3 (tiga) kali dalam 1 tahun pada bulan Februari, Juni dan Oktober.
Arjuna Subject : -
Articles 12 Documents
 1   2 
Search results for , issue "Vol 20, No 3 (2023): October" : 12 Documents clear
Analysis of the Application of the Rest Hour Maritime Labor Convention 2006 on MV. Pan Energen Crews to Improve Working Conditions With Analytical Hierarchy Process (AHP) Method Aprillia, Namira; Mulyatno, Imam Pujo; Mursid, Ocid; Yulianti, Serliana
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 3 (2023): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i3.58807

Abstract

The contribution made by the crew is very important for the welfare of the company and the performance on board. But their well-being has not been paid enough attention in the maritime world. Heavy workloads and working hours and lack of implementation of rest hours trigger human error and are prone to fatigue. The implementation of the Maritime Labor Convention 2006 has contributed significantly to the improvement of the working conditions of the crew.  The purpose of this study is to determine the right criteria and strategic solutions in helping to improve the application of rest hours to crew members. Criteria and strategy solutions were obtained through the Analytical Hierarchy Process (AHP) and Expert Choice methods are used as supporting software for calculations. The stages of observation, interviews, dissemination of questionnaires, modeling and choice are processes carried out in data processing.  Rest time criterias with a weight value of 0.534 and an inconsistency value of 0.004466 was the main criteria chosen by the respondents. Meanwhile, Sleep Duration is a strategy solution chosen as the top priority with the weight value of 0.220 with an inconsistency value of 0. The results of the two inconsistencies each have a CR value of < 0.1 indicating that the results of rest hour application data processing based on the 2006 Maritime Labor Convention can be declared consistent and accurate.
Evaluating Wave Potential and Assessing the Economic Viability of Wave Energy Converters in the South Java Seas Waskito, Kurniawan Teguh; Yudho, Renaldi H; Yanuar, Yanuar; Rahardjo, Gema P
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 20, No 3 (2023): October
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v20i3.60005

Abstract

As an archipelagic nation, Indonesia holds substantial potential for wave energy as a renewable resource. Certain coastlines of islands facing the Indian Ocean, particularly in the western and southern regions, exhibit significant wave energy throughout the year. To identify suitable locations for Wave Energy Converter (WEC) installation, it is essential to assess wave hindcast data. This study utilizes NOAA and ERA5 reanalysis wave data to analyze wave characteristics in Indonesia from 2008 to 2018. Data processing with Ocean Data View is employed to estimate key wave parameters at various locations, including significant wave height, mean wave period, and mean wave direction. Two locations in the South Java seas were identified for WEC installation based on this research. The average values for the period 2008 to 2018 indicate a significant wave height of around 2m, with a maximum height of 5m, a wave period of 10–14s, and a wave direction of 195–210 degrees. Notably, NOAA data suggests a higher estimation of significant wave height compared to ERA5 data. The average annual wave power potential based on ERA5 and NOAA is 164.43 MW/m and 252.15 MW/m, respectively. Furthermore, this study incorporates an economic simulation for the construction of a multi-point absorber WEC. The objective is to offer insights into the Levelized Cost of Electricity (LCOE) and compare it with other WEC technologies. Assuming a WEC capacity of 130 kW, the total construction cost is estimated at $2,093,725, resulting in a Levelized Cost of Energy (LCOE) of $91/MWh.

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