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Marine Science and Technology Journal
Published by Universitas IVET
ISSN : 27150305     EISSN : 27461580     DOI : https://doi.org/10.31331/maristec
Core Subject : Engineering,
Engineering
The range of topics extends from research in naval architecture, marine engineering, and ocean engineering to marine-related research in the fields of environmental science and technology, oceanography, computational mechanics, and information technology. In addition to original, full-length refereed contributions presenting new research and developments in the field, the journal also publishes review papers authored by leading authorities. Presents new research in naval architecture, marine engineering, and ocean engineering Covers marine-related research in environmental science and technology, oceanography, computational mechanics, and information technology Publishes original research contributions and reviews authored by leading authorities
Arjuna Subject : Teknik (semua kategori) - Teknik Kelautan
Articles 72 Documents
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Analisa Terhambatnya Proses Discharge Pada Cargo Pump Di Kapal MT. Karmila Darmana, Eka; Supriyadi, Agus
Marine Science and Technology Journal Vol 2 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1587

Abstract

PT. Pertamina appointed the MT ship. Karmila becomes a bunker ship, which is useful for supplying MFO fuel to Pertamina's ships and Pertamina's charter ships operating in the Dumai port area. So that the cargo pump plays a very important role in the fuel supply process. Obstruction of the discharge process will result in a decrease in the performance of the cargo handling process which will hamper ship operational activities. The method used is a case study with a qualitative descriptive analysis approach. Data collection obtained by direct observation at MT. KARMILA which is a ship owned by PT. PERTAMINA and direct interviews with the ship's crew. In addition, data sources are also obtained from the instruction manual, SOPs on board and references from articles related to pumping rates. The results of this study state that the problems that occur when the cargo supply bunker discharge is caused by several factors such as difficulty in adjusting the pumping rate for the supply bunker according to pipe capacity, the temperature increase of the electro motor cargo pump (overheating), the high initial load so that the generator is unstable, damage to the connection hose to the supply bunker. These things cause problems when the cargo discharge process for supply bunkers. One solution to overcome these problems is to control the rotation of the electro motor cargo pump using an inverter so that the pumping rate can be controlled as needed so that excess load and pressure can be avoided.
Perhitungan Volume Bahan Bakar Kapal Perintis KM Sabuk Nusantara 71 Dengan Metode Simson I dan Autocad Langgeng, Diana; Saputra, Dimas Adi
Marine Science and Technology Journal Vol 2 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1555

Abstract

Calculating the volume of the ship is irregular using the Simson method. The simson measurement is to first calculate the volume of a certain room that is irregular, then divide the room into several parts. Then the calculation results of the Simson I method, autocad are compared which is the closest to knowing the tank volume of the model. From the results of data analysis it can be determined that simson 184.068267 m3, autocad 176.183925 m3.
Ballast Water Treatment (WBT) Technology dan Implementasi Konvensi Internasional untuk Kapal Berbendera Indonesia Budi P; Ratna Dwi Kurniawan; Nanang JS
Marine Science and Technology Journal Vol 1 No 1 (2020): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar

Abstract

The invasion of new species, even new diseases, in an environment can threat existing species and environmental balance. As the COVID 19 pandemic, that the virus spreads so fast, through physical contact. As to the spread of COVID 19, the movement of marine biota that enters and exits along with ballast water used by ships has long been regulated in a convention of IMO. In the regulation it is clear that the deadline for ships to have ballast water treatment is September 2017, but after 3 years have passed, have these rules been implemented in Indonesia? From the results of the interviews of several domestic broadcasting companies there are have already run the convention and have not completely equipped their vessels with WBT. In this article we will discuss theregulation / policy basis of the government, and the technologies that can be applied and meet the standards.
The Effectiveness Of Using “Nas Daily” Youtube Channel In Improving Speaking Skill Wibowo, Rahmat Ari; Sulistyorini, Dwi
Marine Science and Technology Journal Vol 2 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1588

Abstract

The structures of spoken language are quite different from the written language, which they have time to plan, edit and correct what they produce. Our personality, ourselves image, our knowledge of the world and our ability to express our thoughts are reflected in our speaking performance. In Ivet University, where the research was taken place, I found problems of learning English speaking skill that come from students, teacher, strategy, and facility of learning. Youtube can be a learning resource and learning media that can meet the demands of the digital generation. Youtube can increase interest and support the learning styles of the digital generation. Youtube also offers learning experiences with new technologies that will be useful when they graduate. This research uses descriptive qualitative method as the method of the research. The analysis conducted to the first semester students of ship Machinery Department of Ivet University, The aim of this research was to know the effectiveness of using YouTube video in developing students' speaking skills. The assessment was in form of speeches in front of the classroom. There are 25 cadets for the 1st semester of 2020, all of whom are internet generations. The research lasted for 1 month which consisted of 2 meetings per week. In the Nas Daily Youtube Channel it is packaged attractively and in each video there are English subtitles that can be used by cadets to learn about the formation of English sentence structures, learn about pronunciation, intonation, grammar, etc. The results showed that videos on Youtube can be used as a learning medium, and the cadets enjoy learning with it.
Pemanfaatan Besi Scrap Sebagai Bahan Dasar Industri Peleburan Baja Suyanto, Suyanto; Wibowo, Riyanto; Pramono, Sri
Marine Science and Technology Journal Vol 2 No 2 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v1i2.1557

Abstract

Many steel industries use scrap material as their basic material, both in the machine industry and the metal industry. The reason for using scrap is because this material is easy to obtain, has a high comparative value, has a chemical composition that is still very possible for further processing, and can reduce problems related to metal waste. Scrap material has a non-uniform type and chemical composition. The mistake in determining the type and composition of the basic ingredients will risk producing products whose specifications are not as expected. For that, before scrap is processed, it must first be grouped according to its type, then it is necessary to know in advance the chemical composition of each type of scrap ferrous material. Calculation of material composition before smelting must be precise, referring to the chemical composition standard that becomes the reference. The production of scrap iron into concrete reinforcing steel at PT Abadi Jaya Manunggal shows that scrap iron can be recycled and processed to produce reinforcing steel for concrete by taking into account the correct scrap composition. The chemical composition test results of scrap iron smelting show a composition identical to that of grade 250 steel. The result of the calculation of carbon equivalent is 0.317%, lower than the required maximum limit of 0.6%.
Experimental Pengukuran Volume Tanki Bahan Bakar Di Kapal Dengan Metode Simson I Dan Simson II Ratna Dwi Kurniawan; Budi P
Marine Science and Technology Journal Vol 2 No 1 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v2i1.1772

Abstract

A ship is a floating Structure that moves and is used in water ttransportation, to good manouvering, and to get a certain speed with propulsion efficiency, ship hull is commonly streamlined and designed so that obstacles or frictional forces with water are small, streamline forms in general the shape follows the flow of fluid or water so that the shape of the hull is curved. With a curved shape, the shape of the room inside also follows the hull of the ship, as well as the shape of the fuel tank, lubricant tank , fresh water tanks, liquid cargoes are also curved / curved or not square, tubes that are easy to determine volume. This volume calculation needs to be done carefully because it involves the need for fuel, fresh water, lubricants that will be needed during the trip in order to ensure that the needs are fulfilled until the destination. There are several methods for determining the area and volume of a curved plane, such as trapezium, simson etc. In carrying out measurements, students often have difficulty in understanding the method of measuring the area and volume of curved spaces on the ship, so it is necessary to make a real model, From the experimental results, it is known that for Samson's rule 1 there is a volume difference of almost 8%, for Samson II's rule it is 6%.
Pengaruh Penyumbatan Kerak Pada Sistem Injeksi Bahan Bakar Terhadap Daya Motor Induk Kapal Riyanto Wibowo
Marine Science and Technology Journal Vol 2 No 1 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v2i1.1781

Abstract

Cases of decreased mains motor power often occur on ships, especially ships that are old. However, it is rarely thought that this is caused simply because the carbon crust that clogs the fuel injection system in this case is the nozzle. Blockage of the nozzle crust can be fatal in reducing the power of a ship's motor. Like what happened to the motor of the Kirana II ship, the power of the motor has decreased. As a result, the actual 0.5 mm nozzle hole has been reduced for each nozzle; Nozzle1 0.32mm, nozzle2 0.34mm, nozzle3 0.36mm, nozzle4 0.38mm, nozzle5 0.30mm, nozzle6 0.40mm, nozzle7 0.28mm, nozzle8 0.34mm, so that the motor power has decreased from the previous 4400 HP to 3033.7 HP, this means the motor has a power loss of 1366.3 HP. The shrinkage of the nozzle hole is due to dirt in the form of combustion crust.
Penentuan Kebutuhan Pompa Air Bersih Fakultas Kemaritiman UNISVET Suyanto Suyanto
Marine Science and Technology Journal Vol 2 No 1 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v2i1.1783

Abstract

Determining the need for clean water needs to be planned properly. In determining the need for clean water, it is necessary to estimate the number of occupants or building users on average every day. On this basis, it is necessary to calculate the average daily water requirement. The determination of the size of the pipes and water pumps also needs to be taken into account based on the consideration of the initial information on the need for water supply. The piping installation and the determination of the pump supplying clean water in the Faculty of Maritime Affairs have not been based on the calculation of the need for clean water at the Faculty of Maritime Affairs. For this reason, this article will be presented calculation of the need for clean water in the Maritime Faculty building, and the specifications of the pump that will need to be used. With the calculation and analysis of the existing data, it is obtained that the average clean water requirement is 3.36 m3/hour in peak conditions of 6.72 m3/hour. The pipe used is PVC with a diameter of 1.5 inches. The pump used is 750Watt of electricity, 6m of suction power and 12m of thrust, and a capacity of 240 lt/min.
Kajian Kekuatan Struktur Pondasi Mesin Induk Harbour Tug Boat Kintan Muthia Yasmine Emily; Priyambodo Nur Ardi Nugroho; Boedi Herijono
Marine Science and Technology Journal Vol 2 No 1 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v2i1.1769

Abstract

The main engine has its own weight, and vibration also occurs so the heavier the load that the foundation holds. The foundation has an essential role as a retainer or support for the load, so it must be stronger to withstand the dynamic vibrations of the main engine. The installation of the foundation is made in such a way that the alignment of the engine shaft axis with the propeller shaft is guaranteed. The problem to be solved is how much load is received, whether the stress results still meet the class requirements, and the estimated age of the foundation. Using the calculation of applied mechanics, the load that will be received on the foundation and the main engine foundation construction planning can be known. To find out the results of the construction planning using the Finite Element Method. The analyzed structure is divided into smaller and simpler elements in a finite number by giving the value of the simulated structure boundary conditions. The analysis results show that the maximum stress value obtained is 267.1 MPa, while the allowable stress value is 300 N/mm2. So that the foundation can be declared to have met the requirements and is safe. For fatigue life analysis, the foundation age is 34,422 years, where the age has met the requirements
Studi Komparasi Konduktivitas Konduktor Tembaga Bentuk Serabut Dan Pejal Dengan Media Air Tawar (H2O) Rita Hariningrum; Sukarno Budi Utomo
Marine Science and Technology Journal Vol 2 No 1 (2021): Marine Science and Technology Journal
Publisher : Universitas Ivet

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31331/maristec.v2i1.1780

Abstract

Choosing a good conductor is still a problem. This is due to many factors including the cost and time required as well as expensive facilities but so far to determine the quality of materials accurately and effectively in a simple way has not been carried out except through complex laboratory tests such as through photo electrons and mechanical tests of materials which are expensive. . It is possible by the principle of heat dissipation in the conductor which as an alternative to the new test method is estimated to be low cost. Tests with the heat dissipation method on the conductor can be seen macroscopically that the conductivity is very influential in the conductor because it involves the speed of electrons contained in the conductor, if the conductor has a small resistance then the conductor has a high conductivity speed or in other words that the conductor has a high resistance. Small is a good conductor material used as a conductor.

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