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Kusnindar Priohutomo
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WAVE: Jurnal Ilmiah Teknologi Maritim
Published by Badan Riset dan Inovasi Nasional
ISSN : 1978886X     EISSN : 2614641X     DOI : https://doi.org/10.55981/wave
Core Subject : Science, Engineering,
Control & Systems Engineering Energy Engineering Mechanical Engineering Transportation
WAVE: Jurnal Ilmiah Teknologi Maritim (Journal of Maritime Technology) (e-ISSN: 2614-641X, p-ISSN: 1978-886X) is journal for publication result in science, assessment and application of technology from Engineer, Scienties, Researcher, Lecturer and Scholar in Maritime Technology (Naval Architecture, Offshore Engineering and Coastal Engineering). WAVE is an accredited Sinta 4 which is publised twice a year in June dan December. WAVE accept journal manuscript is result from research (not journal review) and is never publish anywhere. Journal manusript have focus and scope in Maritime Technology (Naval Architecture, Offshore Engineering and Coastal Engineering) which cover: Shipbuilding and Floating Structure Design Technology Hydrodynamic Technology of Offshore Structures Marine Engineering and Underwater Acoustic Technology Planning & Management of Ports and Coastal Areas Port Infrastructures and Coastal Structures Technology Coastal Processes Ocean Wave Mechanics, Extreme Waves/Tsunamis, and Other Water Related Disasters Coastal Hydroinformatics Marine Renewable Energy Conversion Technology Marine Numerical and Safety Analysis WAVE is index in: DOAJ, GARUDA, SINTA, GoogleScholar, Dimensions, OpenAire, ScienceGate, Scilit, ROAD, WorldCat and Crossref.
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 5 Documents
 1 
Search results for , issue "Vol. 18 No. 2 (2024)" : 5 Documents clear
Stability and Longitudinal Strength Analysis on Barge 400 Ft During Sea Transportation Decommissioning Jacket Michael Parulian; Nurmawati; Anggoronadhi Dianiswara
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 18 No. 2 (2024)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2024.1910

Abstract

Transporting a dismantled offshore platform has its challenges in the process. The stability and longitudinal strength of the decommissioning barge used are common problems in this process. Stability analysis will be carried out in intact and damaged conditions while longitudinal strength analysis will be carried out during still water, hogging, and sagging conditions. From the results of the stability analysis that occurred, the initial GM value was obtained in the intact condition of 52.29 m and damage of 47.72 m, 47.69 m, 47.83 m, and 47.81 m. Then, the intact range value that occurred in intact condition was 86° and damage of 82°, 82°, 83.04°, and 82.9°. Next, the ratio area value that occurred in intact condition was 11.22 and damage of 37.24, 43.09, 36.95, and 47.59. Then, from the results of the longitudinal strength analysis, the bending moment value was obtained in still water, hogging, and sagging conditions respectively of 16410 Ton.m, 52740 Ton.m, and 37210 Ton.m and the value of shear forces in still water, hogging, and sagging conditions respectively of 619.092 Ton, 1552.973 Ton, and 1391.362 Ton. The results of stability and strength analysis meet their respective criteria.
Analyzing The Total Resistance and Wave Pattern of Modification Hull Form Design Catamaran Fishing Vessel Rizqi Fitri Naryanto; Muhammad Yusuf Wibowo; Aldias Bahatmaka; Muhammad Hafiz Izzuddin; Lanang Puspa Buana; Rafif Dimas Pratama; Fiqri Fadillah Fahmi; Andi Abdullah Ghyferi
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 18 No. 2 (2024)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2024.2165

Abstract

Indonesia is located between the Pacific Ocean and the Indian Ocean. In addition, Indonesia is a maritime country, with data stating that Indonesia’s sea proportion is 64.97% of the total territory of Indonesia. Diverse marine resources exist in Indonesia, and the country produces 8.02 million tons of fish annually. In Indonesia, the traditional fishing vessel serves as both a mode of transportation and an element of livelihood. It was built using techniques passed down from generation to generation. Therefore, it is necessary to investigate the fishing vessels in order to determine their resistance profile and wave pattern. This analysis is done to take the catamaran-hull fishing vessel design into reference. The performance of ship design can be quickly predicted using a computational approach. The Slender Body approach and Savitsky's mathematical model are used to investigate the resistance analysis. The primary method used to describe the efficacy of the methodology is study comparison. This research will discuss the three variations of the fishing vessel design.
Analisis dan Perancangan Sistem Informasi Pada Pelayaran Rakyat Secara Terintegrasi (Studi Kasus: Muatan Kapal Rakyat) Alwi Sina Khaqiqi; Siti Rahayuningsih; Muhammad Alhazman; Gusma Hamdana Putra
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 18 No. 2 (2024)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2024.8053

Abstract

Manajemen transportasi pelayaran rakyat memiliki hubungan yang erat dengan manajemen sistem informasi kondisi muatan. Pelayaran rakyat yang saat ini masih menggunakan sistem informasi yang tradisional dikarenakan minimnya fasilitas yang menunjang kegiatan pengiriman barang. Ada pengguna yang meninggalkannya karena kurang praktis dan kepercayaan terhadap kondisi barangnya. Pihak pengguna hanya bisa menunggu kabar melalui tatap muka dan sambungan telepon, jadi tidak bisa mengetahui dengan pasti kondisi dan keberadaan barangnya. Dengan adanya kendala tersebut maka dibutuhkan fasilitas penunjang sebagai sumber pertukaran informasi yang baik. Dengan adanya kondisi tersebut para pemilik barang yang hendak mengirimkan barang harus melebihkan barangnya, agar jika terjadi kerusakan ataupun kehilangan muatan barang dapat diterima oleh penerima sesuai dengan jumlahnya. Kemampuan untuk tracking dan tracing sangat penting bagi upaya mengetahui kondisi barang saat dilakukan pengiriman. Maka dari itu dibuatkan sebuah sistem informasi yang bisa digunakan sebagai alat untuk mengetahui kondisi muatan yang di kirim. Dengan menggunakan alat pelacak muatan berupa barcodes scaner dan website didapatkan nilai kelayakan menggunakn Benefit Cost Ratio (BCR) sebesar 1,22.
Energy and Operating Costs of Methanol Fuel on A 4000 DWT Oil Chemical Tanker Abyan Ariaputra Aziz; Fajri Ashfi Rayhan; Agus Dwy Bramastha; Muhammad Afrizal; Muhammad Sugeri; Amir Marasabessy
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 18 No. 2 (2024)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2024.8274

Abstract

The International Maritime Organization (IMO) has introduced regulations that the shipping industry must reduce Greenhouse Gas Emissions by at least 50% by 2050 compared to 2008. At the same time, the IMO predicts that global shipping emissions will increase by 250% by 2050. Therefore, the Shipping Industry must fix this problem by reducing carbon emissions. Methanol Fuel is an alternative fuel for ships that is cost-effective, low-emission, environmentally friendly, and renewable. Methanol can reduce SOx emissions by up to 99%, NOx emissions by up to 60%, and Special Particulates by up to 95%. The purpose of this study is to make adjustments to the methanol-fueled main engine, calculate energy, operating costs,  main engine retrofit prices, and return periods on the  Oil Chemical Tanker 4000 DWT ship with the method of Round-Trip Shipping with Route Variations, Composition, and Fuel Prices. From the discussion of this study, it can be concluded that the calculation of energy and operating costs of Heavy Fuel Oil (HFO) and methanol is influenced by the amount of fuel used during the voyage, in addition to the results of the calculation of energy, operating costs, and retrofit prices on the Oil Chemical Tanker 4000 DWT (Deadweight Tonnage) ship with a voyage on the American route of 3,467,320 MJ, Rp. 1,565,684,341.-, and a 2.4-year return period, the European route of 3,137,099 MJ,  Rp. 1,352,844,897.-, and 2.8 years of return period, and Asia Pacific routes of 3,274,914 MJ, Rp. 1,069,629,506.-, and 3.5 years of return period, as well as the price of the main engine retrofit, which reached Rp. 7,574,435,035.-. These findings offer valuable insights for shipping companies to make informed decisions about fuel selection and retrofit investments, potentially leading to significant cost savings and a reduced environmental footprint. Furthermore, the study provides a strategic foundation for complying with IMO regulations and achieving long-term sustainability goals in the maritime industry.
A Modular Tide LevePrediction Using Combination Ofharmonic-Analysis and Nonlinear Autoregressive Exogenous (Narx) Methodology in Semarang Indonesia Elvien Hastatomo Khasby; Anistia Malinda Hidayat; Usman Efendi; Pulung Nurtantio Andono; Catur Supriyanto; Arief Soeleman; Ferry Oktarisa; Aurel Dwiyana
WAVE: Jurnal Ilmiah Teknologi Maritim Vol. 18 No. 2 (2024)
Publisher : National Research and Innovation Agency (BRIN Publishing)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/wave.2024.8608

Abstract

Semarang is highly prone to tidal floods year-round, making tidal prediction using methods like Harmonic Analysis with Least Squares (HA-LS) crucial for disaster mitigation. However, this method is not effective enough because it has relatively high Root Mean Squared Error (RMSE) value of up to 11.43 cm with coefficient of determination (R2) of around 0.727. The Nonlinear Autoregressive Exogenous (NARX) neural network model is then proposed to improve the accuracy of tide predictions. In general, the features used as input are divided into two types, namely atmospheric/weather data (temperature, pressure, direction, and wind speed) and estimated tide data from the HA-LS method. This research aims to analyze whether this type of neural network is suitable to be applied in Indonesia since the ocean and atmosphere condition might vary. Tidal observation data from the Tanjung Mas Maritime Meteorological Station is used as target data/actual data. Three scenarios are used by varying input types to find out which type of input produces the best performance of model prediction. Moreover, before feeding input data into the NARX neural network, all atmospheric data used as input are standardized using Z-score normalization, often called Min-Max scaling which can avoid the effect of outlier in the dataset. Based on these three scenarios, the use of combined atmospheric/weather data and tide estimates from HA-LS calculations as input to the NARX model produces the best predictive performance with the smallest RMSE value among all scenarios, approximately 5 cm, and the highest coefficient of determination (R2) at about 0.974. These results indicate that NARX model can predict tides with high accuracy in Semarang.

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