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Ocean Engineering: Jurnal Ilmu Teknik dan Teknologi Maritim
Published by Universitas Maritim AMNI Semarang
ISSN : 29635012     EISSN : 29635454     DOI : 10.58192
Core Subject : Engineering,
Engineering Mechanical Engineering
Menyambut baik kiriman yang memberikan wawasan tentang masalah terkini dan utama yang berhubungan dengan ilmu Teknik dan Teknologi Maritim. Artikel bisa ditulis dalam bahasa Inggris atau bahasa Indonesia.
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 127 Documents
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Rancang Bangun Kapal Tanpa Awak Guna Mendeteksi Navigation Lamp Untuk Menghindari Tubrukan Akhmad Rizqi Aprilianto; Sri Mulyanto H; Siti Fatimah; Henna Nurdiansari; Akhmad Kasan Gupron
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2215

Abstract

The Unmanned ships have become a primary focus in maritime technology development to enhance efficiency and navigational safety in waters. In this research, a unmanned ship utilizing ESP32CAM as its core system is designed to detect navigation lights of other vessels and avoid potential collisions. The initial response of the ESP32CAM camera reads the colors of lights approaching the unmanned ship within a distance of less than 100cm. The ESP32CAM reads and identifies colors through image processing. When the ESP32CAM detects green and red lights, it commands the buzzer to sound. The color detection system works such that when the ESP32CAM detects a red light, it sends a signal to the servo motor to move left, and when it detects a green light, it sends a signal to the servo motor to move right. The servo motor functions as the ship's rudder. Testing of the navigation light system with ESP32CAM camera to prevent ship collisions is conducted with predetermined scenarios, including testing with red LEDs, green LEDs, and overall system testing. The results show that the navigation light system with ESP32CAM camera functions well. The ESP32CAM camera can optimally identify light colors at a distance of 100cm. Based on the conducted research, the ESP32CAM camera is capable of reading both the distance and colors of lights as specified at a distance of 100cm.
Analisis Biaya dan Waktu dengan Metode Time Cost Trade Off menggunakan Aplikasi Primavera P6 Muhammad Fahri Faqihhuddin
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2411

Abstract

In the construction industry, management costs and construction project time are important factors for achieving project success. Cost overruns and time delays can result in significant financial losses for project owners and contractors. Therefore, it is important to adopt an effective approach to construction management to optimize project costs and time. One method for overcoming problems in achieving construction project cost and time targets is the Time Cost Trade Off (TCTO) method. The TCTO method is an approach used in construction project management to achieve a balance between project costs and time. The analysis results show that the FO Krian Development Project, which has a normal duration of 522 days, can be accelerated to 500 days (scenario 1) and 498 days (scenario 2). Direct costs tend to increase due to additional working hours and additional workforce. The alternative used or which is more profitable in completing the project is to use scenario 2, namely additional labor due to a decrease in duration of 24 days from the normal project time and experiencing a decrease in total project costs of IDR 292,008,708.16.
Kajian Keuletan pada Beton Variasi Limbah Granit Sebagai Substitusi Parsial Agregat Kasar Farhan Nuraziz; Wibowo Wibowo; Endah Safitri
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2412

Abstract

Concrete is one of the most common construction materials used throughout the world. Concrete consists of three main components: cement, coarse aggregate, and fine aggregate. Coarse aggregate serves as the main structural component in concrete, providing strength and resistance to external loads. Currently, technological advancements in construction are rapidly progressing. Therefore, innovation in concrete production is necessary, one of which is recycled aggregate concrete. The aim of this research is to determine the effect of using granite waste as a partial substitute for coarse aggregate on toughness of concrete. The method used in this research is experimental method. In this study, the variation level of granite waste used in this study was 0%; 15% ; 30% ; and 45%. The objects used for this research are blocks with dimensions of 400x100x100 mm tested using a Universal Testing Machine. The results of this research show that the toughness value obtained from the results of toughness testing on concrete with varying levels of 0% granite waste; 15% ; 30% ; and 45% respectively, namely 1.9589 kNmm; 2.2362 kNmm; 2.4189 kNmm; and 2.2118 kNmm.
Faktor Pengelolaan Operasi dan Pemeliharaan Irigasi di Kabupaten Tanah Datar Yuni Purnama Syafri; Barkhia Yunas; Juwita Wirta Sri Devi; Hanafi Malik
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2416

Abstract

Based on the Regulation of the Minister of Public Works and Public Housing of the Republic of Indonesia Number 14/PRT/M/2015 concerning Criteria and Determination of Irrigation Area Status, Tanah Datar Regency has 635 regency Irrigation Area authorities with a total Irrigation Area of ​​29,437 Ha. Over the last 5 years, the Tanah Datar Regency Government, especially the PUPR and Land Services Department, has allocated funds both from the APBN (DAK) and from the APBD (DAU) for the construction and rehabilitation of irrigation networks as well as improving irrigation networks, with the result that the irrigation conditions in Tanah Datar Regency are in good condition. good by 56.69%, in other words as many as 379 irrigation areas which were only in good condition were maintained in poor condition. The aim of this research is to determine the factors of irrigation maintenance and upkeep operations in Tanah Datar Regency by looking at six aspects of irrigation network maintenance and rehabilitation. The method used in this research is a qualitative descriptive method. Primary data was taken through interviews with informants from the Public Works and Spatial Planning and Land Service of Tanah Datar Regency, Tanah Datar Regency in the Water Resources sector, namely the Sub-coordinator of the Tanah Datar Regency irrigation Maintenance Operations. The research results show that there are 2 (two) factors that influence Irrigation Operations and Maintenance, namely (1) Condition factors of physical infrastructure and supporting facilities, (2) Personnel and institutional organizational factors of P3A.
Evaluasi Efektivitas Kinerja Instalasi Pengolahan Air Limbah (IPAL) di Kota Surakarta Rizky Nugraha Ramadhan; Budi Utomo; Solichin Solichin; Cahyono Ikhsan; Koosdaryani Soeryodarundio
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 3 (2024): September: Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i3.2421

Abstract

Household sewage treatment in Surakarta City depends on the performance of the available domestic wastewater treatment plants (IPAL), including Pucangsawit IPAL, Semanggi IPAL, Mojosongo IPAL, and UNS IPAL. Each of these IPAL’s serves a specific area, such as the UNS IPAL which serves the UNS area and its surroundings, the Mojosongo IPAL which is in charge of the North Area of Surakarta, the Semanggi IPAL which takes care of the South Area of Surakarta, and the Pucangsawit IPAL which serves the Central Area of Surakarta City. This research aimed at the effectiveness of the performance and development plan of each IPAL in the next 20 years. This research used descriptive qualitative and quantitative analysis methods. Qualitative descriptive analysis was conducted by observing the existing condition of IPAL Komunal in the research location. Quantitative descriptive analysis in this study was carried out by testing samples at the inlet, aeration, and outlet points of the IPAL. Based on the quality standards of the Minister of Environment and Forestry Regulation number P 68 of 2016, each IPAL. UNS IPAL is 47.27% for BOD, 73.81% for COD, 76.36% for TSS. Mojosongo IPAL is 88.71% for BOD, 76.50% for COD, 78.57% for TSS. Pucangsawit IPAL was 91.88% for BOD, 83.20% for COD, 74.82% for TSS. Semanggi IPAL is 20.45% for BOD, 69.95% for COD, 69.05% for TSS. Alternative development at the IPAL that can be done to prepare for the next 20 years is to increase the volume in the initial settling basin, aerobic biofilter basin, and also the final settling basin.
Model Pendukung Keputusan Berbasis Analitical Hierarchy Process Dalam Pemenuhan Alat Keselamatan Kapal Motor Tradisional Prakoso, Muhammad Ravi; Pratomo, Sunu Arsy; Diansisti, Anisa
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2429

Abstract

Traditional wooden motorboats are ships that are built traditionally based on the experience of the builder without a basic design process like modern ships. The sizes of traditional wooden ships are usually small and are mostly used as fishing vessels, passenger ships and inter-island cargo ships, especially in eastern Indonesia. Traditional wooden motor boats have become a means of local transportation to serve shipping needs in the regions and as a means of local transportation. Sailing certainly has various problems which can be caused by weather factors, the condition of shipping lanes, other ships, and things beyond human capabilities, which can cause shipping disruptions and even cause emergencies. Emergency means a situation outside normal conditions that occurs on board a ship which has a tendency to endanger human life, property, objects and the environment where the ship is located. One way to anticipate emergency events is to provide safety equipment. IMO (International Marine Organization) as a maritime world organization issued SOLAS (Safety of Life at Sea) which contains provisions regarding what safety equipment is on board ships such as Life Jackets, Ring Buoys and Fire Extinguisher. However, in fact, fulfilling the safety equipment requires independent costs from traditional motorboat owners so there is a priority in fulfilling the safety equipment. Based on the results of the Analytical Hierarchy Process calculations in priority fulfillment of safety equipment with the final result of 36.6% Life Jacket, 30.8% Ring Buoy and 33.6% Fire Extinguisher. With these results, ship owners can determine their priorities in anticipating future emergencies
Analisis Faktor Yang Mempengaruhi Waktu Tunggu Kapal Di Pelabuhan Tanjung Intan Cilacap Mawardi, Kholid; Santoso , Wahyudi; Weda , Iwan; Yulianto, Yulianto
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2431

Abstract

The waiting time for ships is one of the problems that must be a concern at Tanjung Intan Port Cilacap and which is very influential for the smooth process of unloading coal from coal carriers to Tanjung Intan Port, Cilacap. This study aims to determine the factors that affect the ship's docking schedule, pilotage services, loading and unloading productivity on the waiting time of the ship. This research was conducted at Tanjung Intan Port, Cilacap. Data was collected through observation, literature study, interviews, documentation and questionnaires. The analysis technique used is multiple linear regression with the help of SPSS V.26 program. Based on the results of research and multiple analysis, the following equations are generated:Y = 0.254 +0.297X1+0.585X2+0.177X3+µ. Based on empirical facts and the results of multiple linear regression equations, it is shown that the Ship docking schedule variable (X1) has t count (3.409) > t table (1.98373), pilotage service variable (X2) has t count (5.809) > t table (1.98373), and loading and unloading productivity (X3) has t count (2.967) > t table (1.98373). As for the value of the adjuster R2 = 0.582. This means that 58.2% of the dependent variable (Y) can be explained by the independent variables, namely Ship docking schedules, guidance services, and loading and unloading productivity. While the rest (100% - 58.2%) = 41.8% is explained by other reasons outside the variables studied. Thus, the results of the study show that the availability of docks, guidance services, and loading and unloading productivity has a positive and significant effect on waiting time for ships at Tanjung Inttan port, Cilacap.
Analisis Tingkat Kebisingan di Kamar Mesin Kapal MT. Suchaonugnum Serta Pemilihan Peredaman Wa’addulloh, Mu’izzaddin; Purwanto, Purwanto
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2455

Abstract

Noise can be defined as a sound or noise that can disturb comfort and health and can cause deafness. Noise that occurs continuously with high intensity can unconsciously affect the health of the Crew (ABK) who are on duty on the ship. Health problems can occur because the ABK are required to be in the ship's engine room which can last a very long time according to the route of the ship's voyage. This study aims to determine and analyze the noise in the engine room and accommodation room on the ferry. The data analysis technique used in this study is noise measurement and analysis of measurement data. The results of the study showed that there was 1 room on the MT. Suchaonugnum ship that did not meet the standards of the Indonesian Classification Bureau and MSC.337(91), including the engine control room. The highest noise source produced in the engine room is produced by the auxiliary engine. While in the lounge room, passenger accommodation room and VIP Room the highest sound source is produced by the sound system. The sound system that is always turned on when the ship is operating is one of the sources of noise that makes the noise level in the passenger accommodation room not in accordance with the MSC.337(91) standard because the sound pressure is too high. The noise level in the passenger accommodation space can be overcome by reducing the sound pressure on the sound system.
Manajemen Perawatan Kompresor Udara Pada Mesin Induk di KM Umsini Haryadi, Sugeng; Pratomo, Sunu Arsy
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 3 No. 2 (2024): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v3i2.2469

Abstract

The smooth operation of the ship is inseparable from the support of auxiliary aircraft with good work and maintenance systems. The compressor as a producer of compressed air which will be used for the initial ignition of the main engine, and auxiliary engines as well as working air services in the engine section and the deck section. Thus, maintenance needs to be carried out so that the required air capacity can be fulfilled at any time. For the smooth operation of the machine, good maintenance management is needed so that its condition is maintained and when it is used there are no problems and it can work optimally. Many experts say that how important it is to make a good maintenance management. The method used in this research is the field research method supported by conducting interviews with several parties related to the research topic and supported by library research methods. To carry out maintenance and repairs to the air compressor on the main engine at KM Umsini, it is necessary to carry out maintenance and repair management which includes planning, organizing, implementing and finally controlling. The suggestion that the author can convey is that the ship's crew, especially the engineers, learn correctly the workings or functions of the air compressor on the main engine so that when the ship is operating it experiences problems that can be resolved properly.
Optimization of Making Dahsukim Permits for Foreign Employees Working on Lay Up Ships At PT. Trans Shipping Agency Batam Paula Yuliarta Br Sitanggang; Syarifur Ridho; Dirhamsyah Dirhamsyah; Fadiyah Hani Sabila
Ocean Engineering : Jurnal Ilmu Teknik dan Teknologi Maritim Vol. 2 No. 2 (2023): Juni : Jurnal Ilmu Teknik dan Teknologi Maritim
Publisher : Fakultas Teknik Universitas Maritim AMNI Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58192/ocean.v2i2.2470

Abstract

The purpose of writing this paper is to find out and analyze how to optimize the making of Dahsuskim permits for the residence permits of foreign crew who will work on lay up ships at PT. Trans Shipping Agency Batam and foreign crew who are in Indonesian waters for a long time must be in Dahsuskim. The method used in collecting data is using the Field Research and Liberary Research methods. Dahsuskim is a limited stay permit for Special Immigration Facilities which is specifically intended for foreign workers who work on ships or floating equipment in Indonesian waters. The long processing process has had a significant impact on foreign workers and companies. In carrying out Lay Up activities, the Ship Owner appoints an agent or shipping company to manage all processes of Lay Up activities including taking care of the ship's needs and the needs of the ship's crew. In contrast to routine ships, Lay Up ships will stay for a long time in Indonesian waters and must have permits including residence permits for foreign crew entering and exiting Indonesia. In this case, crew or foreigners entering and exiting Indonesia must have a visa which can only be obtained by submitting an application to the office. Immigration/General of Indonesian Immigration. Immigration plays a very important role because immigration is a government agency whose activities include providing all Immigration permits in the form of visas, entry permits, registration of foreigners, re-entry permits (Exit Re-Entry Permit), non-return exit permits (Exit Permit Only).

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