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THE EFFECTIVENESS ABSORPTION TEST OF LUBRICATING OIL WASTE AND HSD FUEL WITH NATURAL FIBERS (DURIAN SKIN) Abdul Rahman; Wawan Kusdiana; Ayip Rivai; Heru Hadi Suseno
JOURNAL ASRO Vol 10 No 3 (2019): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Pollution of sea water due to oil spills often occurs. Among them are tanker accidents, explosions of offshore oil platforms, ship operation errors and waste from the petroleum and coal industries. Oil spills in the sea often cause pollution which leads to damage to biological resources and damage to the underwater ecosystem. The purpose of this study was to determine the process and processing, and to determine the ability of durian skin to adsorb lubricating oil waste and HSD fuel. This research was conducted by processing the waste with variations of time 2, 5, and 10 minutes. And with variations in durian skin size of 0.25 mm², 1 mm², and 9 mm². With drying of durian skin between 1-15 days with 1-30 days. Then the results were analyzed to determine the efficiency of absorbing durian skin. The results of STTAL laboratory studies showed an increase in durian skin mass after undergoing a process of adsorption of lubricating oil waste and HSD fuel. Thus, the optimal durian skin time and size obtained on lubricating oil waste is 10 minutes with a surface area of 1 mm², mass of 4 grams in drying for 1-30 days. With efficiency of 82.54%. Whereas the HSD fuel is 10 minutes with a surface area of 0.25 mm², mass 4 grams on drying for 1-15 days. With an efficiency of 86.03%.Keywords: Durian skin, adsorption of lubricating oil waste, HSD

THE UTILIZATION OF FUEL DIESEL EMULSION AS A RESERVE SOURCE OF DIESEL FUEL FOR INDONESIAN WAR SHIPS Abdul Rahman; Dwi Kumara; Wawan Kusdiana; Anton Nugroho
JOURNAL ASRO Vol 11 No 04 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37875/asro.v11i04.357

By the development of the time, diesel fuel is made from petroleum which is decreasing in number. Besides that, the emissions produced from burning diesel fuel can also cause air pollution. One of the methods used to minimize the use of diesel fuel and air pollution is by using emulsion fuel. therefore, a precautionary measure is required in preparing a reserve fuel source for Indonesian war ships. And one of the options is with emission diesel fuel. From the results of laboratory trials there was an increase in density, viscosity, flash point, cetane and TAN numbers and a decrease in residue, Lower Heating Value and calorific value. The performance test results show an increase in SFOC and thermal efficiency, but the power, torque and BMEP have decreased. So, it can be concluded that the emulsion HSD has decreased performance but can reduce emissions from the combustion process. So, it is hoped that emission diesel fuel can be used as an alternative as well as a solution to the limitations of diesel fuel in the future, so that it can support tni al operations in the future. Keywords : Diesel fuel , diesel fuel emulsion, reserve fuel, Indonesian Navy Operations

DESIGN OF MANIPULATOR ROBOT IN UNMANNED GRENADE TAMER (UGT) Ayip Rivai Prabowo; Endro Prasetijoadi; Dueng Deriva; Wawan Kusdiana
JOURNAL ASRO Vol 11 No 03 (2020): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37875/asro.v11i03.318

Low safety factor in the Standard Operating Procedure (SOP) in handling grenades that fail to explode at the training location can be fatal for personnel and instructors. In a previous study, a stick manipulator was designed. However, this tool has disadvantages because the operator is too close to explosives. By considering the security of personnel, the authors make "Design Robot Manipulator Build on Unmanned Grenade Tamer (UGT)". This tool is used to assist trainers and instructors in the implementation of laying explosives as a procedure for handling grenades that do not explode properly in position. The mechanism of this tool is made to complement the base tank that is driven by a robot remote control system that moves using a servo motor as an actuator. The total length of the horizontal arm stretch is 780 mm and 795 mm for the vertical stretch. Arm foundation is designed capable of rotating as far as 120⁰. Link 1 moves 150 °, link 2 150 °, Link 3 1801, and wrist roll 90 °. The force acting on link 1 is 16.758N in the direction of the y-axis parallel force, torque is 5.5 Nm and with an angular acceleration of 142rad / s². On the link 2 force of 16.66N, the direction of the force is parallel to the y axis, torque of 9.4 Nm and angular acceleration of 496rad / s². And on the 3 link force of 14.7N of torque of 3.3 Nm and angular acceleration of 293rad / s². The gripper gripping force is 1,158 kgf which is driven by a servo motor with a minimum torque of 5.42 Nm. Keywords: Robot arm, Torque, Gripper

DESIGN FREE SURFACE TANK ON FAST MISSILE BOAT 60M Sutrisno Sutrisno; Andi Mawanto; Wawan Kusdiana; Cahya Kusuma
STTAL POSTGRADUATE - INTERNATIONAL CONFERENCE Vol 4 No 1 (2020): Indonesia Naval Technology College STTAL Postgraduate International Conference -
Publisher : Indonesian Naval Technology College STTAL

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Rolling motion is important role in the stability of the ship. Predicting the motion of a ship design must be done to see the design performance. The magnitude of the resulting motion response will affect the comfort and safety of personnel and materials in the ship. For this reason, simulation and analysis rolling and pitching prediction are carried out when the ship is operating, with and without the addition of a free surface tank (FST) as a stabilizer system with variations in the FST base height, water volume, boat velocity, heading direction and the waves. The prediction of ship motion in this research is ushing shipmo software and to assess operational feasibility, the general criteria standard issued by NATO STAGNAG 4154 (US. Navy) and US Coast Guard. From the simulation results it was found that increasing the height of the FST base from the base line decreases rolling motion. At a height of 4 m the maximum response magnitude below the allowable standard is 3,365 deg, while at a height of 3 m above the allowable standard that is 4,734 deg. The addition of FST and variations in placement of the FST base height from the base line did not significantly affect the pitching motion of the ship. Heading direction, waves and operational speed of the ship need to be considered to get the minimum rolling motion response when the ship is operating. Keywords: Fast Missile Boat 60M, Free Surface Tank, Pitching, Rolling, Shipmo.

POLICY STRATEGY FOR EMPOWERMENT OF BORDER AREA IN IMPROVING MARITIME SECURITY Richard Martin; Kornia Adhi Nugraha; Wawan Kusdiana; Eko Krisdiono
JOURNAL ASRO Vol 13 No 2 (2022): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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The border area of a country is the main capital of a country's sovereignty. One of the islands whose position is at the forefront and at the same time the outermost border of Indonesia and other countries is Alfa Island. The research method used in this research is to use the integration of strength, weakness, opportunity, and threat (SWOT) analysis methods and the Borda method in formulating a strategy for developing the empowerment of the Miangas Island marine defence area. SWOT analysis is used to formulate and provide alternatives in the development strategy of developing a strategy for the empowerment of the Alfa Island marine defence area. And the Borda method is used to determine priorities for the selected strategy. With this research, it is hoped that it can encourage and become government input in managing the policies of the outermost islands by giving special attention to minimizing vulnerabilities and potential threats and increasing the positive potential that already exists on Alfa Island. Based on the research results, obtained 6 strategies. The weight calculation results show that the WO 1 strategy has the highest weight and is a priority strategy, which is to take advantage of the Indonesian Navy's MEF policy opportunities by increasing the Posal Alfa Capability that supports active patrols and sea operations of Posal Alfa. Keywords: SWOT Analysis, Alfa, Borda. Method

WORK SAFETY RISK MANAGEMENT TOWARDS ZERO ACCIDENT IN FASHARKAN SURABAYA Susminarto Edy Herlambang; Wawan Kusdiana; Priiyadi Hartoko
STTAL POSTGRADUATE - INTERNATIONAL CONFERENCE Vol 6 No 1 (2022): Indonesia Naval Technology College STTAL Postgraduate International Conference -
Publisher : Indonesian Naval Technology College STTAL

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Occupational health is an element of health related to the work environment and work, which can directly orindirectly affect work efficiency and productivity. Meanwhile, work safety is the main means to prevent workaccidents that can cause harm in the form of injury or injury, disability or death, property loss, damage toequipment or machinery and environmental damage widely. In essence, Occupational Safety and Health (K3) isan effort to create protection and security from various risks of accidents and hazards, both physical, mental andemotional to workers, companies, communities and the environment. In addition, occupational safety and healthis expected to create work comfort and high work safety as stated in PerKasal Number 26 of 2018 concerningOccupational Safety and Health in the Indonesian navy. This study aims to find out what types of accidents havea high risk in Fasharkan Surabaya, find out what impacts can be caused by high risk accidents and obtain stepsthat can be taken to reduce work accidents at Fasharkan Surabaya by using the Formal Safety Assessment (FSA)Method. There are four types of accidents that occur in Fasharkan Surabaya with the highest starting risk ranking,namely human accidents with work equipment, human accidents with property, human accidents with worksystems and human accidents with the environment. The impact of the four accidents caused substantial materiallosses. To reduce the risk of the three types of accidents, the lowest Implied Cost of Averting a Risk (ICAR)measurement is carried out for each risk reduction option. The risk mitigation carried out is providing training forGeneral K3 Experts, Electricity & Generators who have an ICAR of 92 million rupiahs, training of Fire K3 Officerswho have an ICAR of 15.75 million rupiahs, Implementation of Work SOPs and Tightening of Supervision whichhas an ICAR of 12.5 million rupiah, and Procurement of Work Safety Equipment in the work area of workshopsand ships as well as Personal Protective Equipment for each worker who has an ICAR of 53.5 million rupiah.Keywords: Formal Safety Assessment (FSA), Risk Assessment, Work Accident.

PERANCANGAN APLIKASI DATABASE LOGISTIK BERBASIS ANDROID PADA KRI BSC-945 GUNA MENDUKUNG KESIAPAN KAPAL BERLAYAR Abram Yoga Raharjo; Wawan Kusdiana; Arie Marbandi; Hamzah
Saintek: Jurnal Sains Teknologi dan Profesi Akademi Angkatan Laut Vol. 15 No. 2 (2022): SAINTEK JURNAL AAL
Publisher : AKADEMI ANGKATAN LAUT

KRI BSC-945 adalah kapal berjenis TALL SHIP, dimana KRI jenis ini pasti melaksanakan pelayaran setiap tahunnya. Dalam mendukung pelayaran tersebut pasti dibutuhkan manajemen logistik dimana logistik sendiri sangatlah penting guna mendukung operasional pelayaran. Dalam pengolahan data persediaan barang selama ini masih menggunakan sistem yang terkomputerisasi namun sederhana yaitu menggunakan software Ms.Excel, sehingga dalam perhitungan persediaan barang mengalami kendala terjadinya kurang cepatnya pendataan stok barang di naval store. Hasil dari penelitian ini adalah menghasilkan aplikasi database berbasis android yang mempermudah anak buah kapal (ABK) untuk mengolah data, membuat laporan kepada pimpinan, dan membantu meminimalkan tingkat kesalahan perhitungan stok. Pada sistem persediaan penulis menggunakan database IdCloudhost dan pemrograman MySQL berbasis android. Setelah peneliti membuat aplikasi database pada KRI BSC-945, aplikasi ini dapat melakukan pengelolaan data yang masuk, keluar, maupun sisa barang yang berada di naval store. Sehingga aplikasi ini aplikasi ini dapat mempermudah pihak – pihak terkait.

IDENTIFICATION AND MAPPING OF THE RELATIONSHIPS BETWEEN CRITERIA IN DECISION-MAKING FOR THE SELECTION OF UNMANNED AERIAL VEHICLES USING THE DEMATEL METHOD Ervin Nurdiansyah; Udisubakti Ciptomulyono; Sutrisno Sutrisno; Wawan Kusdiana
STTAL POSTGRADUATE - INTERNATIONAL CONFERENCE Vol 7 No 01 (2023): Indonesia Naval Technology College STTAL Postgraduate International Conference -
Publisher : Indonesian Naval Technology College STTAL

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Decision-making is the process of selecting from several alternatives. Decision-making in selecting an alternative is a series of long processes, starting with identifying problems, seeking information about the alternatives to be selected, and analyzing how good each alternative is, leading to alternative decisions to be made. At the stage of identifying the criteria of an alternative, it is not only about identifying these criteria but also knowing the interrelationships between the criteria of the alternative to be selected. The DEMATEL method is one of the methods in multi-criteria decision-making that can be used to identify the interrelationships between criteria. In this study, calculations were carried out using the DEMATEL method to identify twenty criteria used in the selection of unmanned aircraft. From the results of this study, the DEMATEL method was able to identify and describe the relationship between the criteria quantitatively in the form of a table of the number of relationships and an impact-digraph map. The results of this study indicate that of the twenty criteria, four of the most influential criteria were obtained in the decision-making process for selecting an unmanned aircraft, with the payload criteria being the most influential criterion with the largest value of 0.412, followed by the political criteria in second place with a value of 0.356, while the endurance criteria and range are in third and fourth place on the four criteria that most influence the decision-making process for selecting an unmanned aircraft with a value of 0.355 and 0.341, respectively. Keywords: Decision Making, MCDM, UAV, and DEMATEL

IDENTIFICATION AND MAPPING OF THE RELATIONSHIPS BETWEEN CRITERIA IN DECISION-MAKING FOR THE SELECTION OF UNMANNED AERIAL VEHICLES USING THE DEMATEL METHOD Nurdiansyah, Ervin; Ciptomulyono, Udisubakti; Sutrisno, Sutrisno; Kusdiana, Wawan
STTAL POSTGRADUATE - INTERNATIONAL CONFERENCE Vol. 7 No. 01 (2023): Indonesia Naval Technology College STTAL Postgraduate International Conference
Publisher : Indonesian Naval Technology College STTAL

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

Decision-making is the process of selecting from several alternatives. Decision-making in selecting an alternative is a series of long processes, starting with identifying problems, seeking information about the alternatives to be selected, and analyzing how good each alternative is, leading to alternative decisions to be made. At the stage of identifying the criteria of an alternative, it is not only about identifying these criteria but also knowing the interrelationships between the criteria of the alternative to be selected. The DEMATEL method is one of the methods in multi-criteria decision-making that can be used to identify the interrelationships between criteria. In this study, calculations were carried out using the DEMATEL method to identify twenty criteria used in the selection of unmanned aircraft. From the results of this study, the DEMATEL method was able to identify and describe the relationship between the criteria quantitatively in the form of a table of the number of relationships and an impact-digraph map. The results of this study indicate that of the twenty criteria, four of the most influential criteria were obtained in the decision-making process for selecting an unmanned aircraft, with the payload criteria being the most influential criterion with the largest value of 0.412, followed by the political criteria in second place with a value of 0.356, while the endurance criteria and range are in third and fourth place on the four criteria that most influence the decision-making process for selecting an unmanned aircraft with a value of 0.355 and 0.341, respectively. Keywords: Decision Making, MCDM, UAV, and DEMATEL

THE ANALYSIS OF THE INFLUENCE OF MODIFICATION OF BOW DESIGN WITH AXE BOW TYPE ON TOTAL RESISTANCE ON 60 METER FAST MISSILE SHIPS Kusdiana, Wawan; Ika, Aris Tri; Yudo, Valentinus; Rahman, Abdul; Syaifi, Mochammad
JOURNAL ASRO Vol. 15 No. 02 (2024): International Journal of ASRO
Publisher : Indonesian Naval Technology College - Sekolah Tinggi Teknologi Angkatan Laut - STTAL

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The bow of the ship is an important part in the design of the ship, as is the bow of the KCR-60, because it is the part that experiences the greatest pressure, stress from the crashing waves, with the Axe Bow bow design which has a bow profile like an axe, the slender shape of the waterline is able to reduce impacts. waves, increase the efficiency of the inflow rate, reduce the resistance the ship receives, resulting in better speed. This research changes the Conventional Bow KCR-60 design into the Axe Bow design concept and calculates the total resistance of the Axe Bow design numerically using the Holtrop method and carries out comparative analysis using the MARIN DESPPC 1999 computing program and Maxsurf Resistance V8i software. The results of this research show that the total resistance value of the KCR-60 Axe Bow bow type at a speed of 28 Knots is 364.2 kN and the Conventional Bow type is 374.5 kN, a difference of 10.3 kN which is 2.75% smaller than the Conventional Bow type in the analysis. Maxsurf Resistance V8i software comparison. For comparative analysis of the 1999 MARIN DESPPC program, the total resistance value of the KCR-60 Axe Bow concept at a speed of 28 Knots is 283.6 kN and the Conventional Bow type is 288.1 kN, the difference is 4.5 kN, 1.56% smaller than the Conventional type Bow. Keywords: KCR-60, Axe Bow, MARIN DESPPC 1999, Holtrop.

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