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ROLL MOTION CHARACTERISTICS OF SHIP WITH LARGE BREADTH AND DRAUGHT RATIO IN FOLLOWING WAVES Paroka, Daeng; Asri, Syamsul
The Indonesian Journal of Naval Architecture Vol 1, No 1 (2013): Indonesian Journal of Naval Architecture
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (567.368 KB)

Abstract

Since the International Maritime Organization decided to revise its intact stability criteria from deterministic based criteria to be performance based one, some researches regarding the ship performance in waves have been conducted by several researches. One of the dangerous condition reccomended to be included in the criteria was the stability of ships in following waves especially for ship with small coefficient for vertical well-sidedness. Ships with large breadth and draught ratio tends to have large the coefficient for well-sidedness. However large roll angle may occur when the ships operate in large significant wave height. The forward speed also could have significant effect on the roll motion characteristics due to time spend of ship in a certain position relative to the wave. This paper discusses effect of restoring arm variation due to waves characteristics and ship speed on roll motion of ships with large breadth and draught ratio in following waves. The waves characteristics is modelled based on the Beaufort scale and the forward speed is estimated by changing the propeller revolution from 6 rps to 15 rps. The results of numerical simulation and discussions show that amplitude of roll motion significantly affected by variation of the waterline area of the ship in sugging and hogging condition. The large roll angle can be avoided by increasing the forward speed with considering the other dangerous condition such as pure loss of stability and broaching.
TINGKAT KELAYAKAN OPERASIONAL KAPAL PERIKANAN 30 GT PADA PERAIRAN SULAWESI (STUDI KASUS KM INKA MINA 957) The Operational Feasibility Level of 30 GT Fishing Vessel in Sulawesi Waters (case study of KM INKA MINA 957) Muhammad, Andi Haris; Paroka, Daeng; Rahman, Sabaruddin; Syarifuddin, `
Marine Fisheries : Journal of Marine Fisheries Technology and Management Vol 9, No 1 (2018): Marine Fisheries - Jurnal Teknologi dan Manajemen Perikanan Laut
Publisher : Bogor Agricultural University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (620.353 KB) | DOI: 10.29244/jmf.9.1.1-9

Abstract

The ability of a vessel to obtain catches is known as fishing vessel productivity. This greatly influences the feasibility level of the fishing operation. The objctive of the study is to evaluate the operational feasiblity level of 30 GT fishing vessel that operates in Sulawesi waters (case study INKA MINA 957). The use of  Net Present Value (NPV) and Internal Rate of Return (IRR) methods showed that the catch should be of more than minimum 116 ton per year or the NPV value at  Rp. 124.797.638,- with 10% interest rate assumption within 10 years. Furthermore, based on the internal rate of return (IRR) the interest obtained was approximately 12.2% which was higher than the market interest rate assumptions at about 2.2%. Keywords: fishing vessel, operational feasibility, NPV and IRRABSTRAKProduktivitas kapal perikanan adalah kemampuan kapal untuk memperoleh hasil tangkapan ikan. Produktivitas ini sangat mempengaruhi tingkat kelayakan operasional. Penelitian ini bertujuan untuk mengukur tingkat kelayakan operasional kapal perikanan 30 GT yang beroperasi di perairan Sulawesi (studi kasus KM INKA MINA 957). Metode Net Present Value (NPV) dan Internal Rate of Return (IRR) telah digunakan untuk mengukur tingkat kelayakan operasional. Hasil analisis menunjukkan bahwa kapal perikanan layak dioperasikan dengan prediksi hasil tangkapan minimal sebesar 116 ton pertahun atau nilai NPV sebesar Rp.124.797.638,- dengan asumsi suku bunga 10% selama 10 tahun. Selanjutnya berdasarkan Metode IRR diperoleh suku bunga 12,2%, hasil ini lebih besar 2,2% sebagaimana asumsi suku bunga dipasaran.Kata kunci: kapal perikanan, kelayakan operasional, NPV dan IRR
LOKASI KRITIS JALUR EVAKUASI PENUMPANG KAPAL PENYEBERANGAN ANTARPULAU DENGAN METODE PERGERAKAN SIMULTAN Muhammad, Andi Haris; Paroka, Daeng
Jurnal Transportasi Vol 15, No 2 (2015)
Publisher : Jurnal Transportasi

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Abstract

Abstract One important factor to avoid casualties on a shipwreck is a safe evacuation route design. Number of locations that can slow the evacuation process, such as doors, stairs and corridors are essential for analysis. This paper discusses a number of critical locations that have the potential failure of evacuation, particularly in the inter-island ferry. The method used to identify the critical location or locations, where the density of passengers occurs during the evacuation process, is the Simultaneous Movement Method. The simulation results showed that the total time required to evacuate passengers was 870 seconds or 14.50 minutes. This time is much smaller than the time required by the International Maritime Organization (60 minutes). Potential passenger density or the critical path starts at the door 1 when the path traversed by all economy class passengers before entering the hall 1 and hall 2. The number of passengers that accumulates at these sites is 72 people on the 300th second. Furthermore, passenger density occurs at the meeting area of the movement passengers toward the exit deck, where the passengers come from the corridors 3 and 4. At that location the density of passengers reached 76 people in the 490th second. The potential location or the critical point of passenger evacuation path occurs at the junction between two or more evacuation lanes, especially in the transition location, such as at doors, stairs, or narrowing lane due to the large number of passengers. Keywords: evacuation lane, critical location, evacuation time, emergency exit, ferry  Abstrak Salah satu faktor penting untuk menghindari terjadinya korban jiwa pada suatu kecelakaan kapal adalah desain jalur evakuasi yang aman. Sejumlah lokasi yang dapat memperlambat proses evakuasi, seperti pintu-pintu, tangga, dan koridor penting untuk dianalisis. Makalah ini membahas sejumlah lokasi kritis yang berpotensi terjadinya kegagalan evakuasi, khususnya pada kapal penyeberangan antarpulau. Metode yang digunakan untuk mengidentifikasi lokasi kritis atau lokasi tempat terjadinya kepadatan penumpang selama proses evakuasi adalah Metode Pergerakan Simultan. Hasil simulasi menunjukkan bahwa total waktu evakuasi yang diperlukan penumpang adalah 870 detik atau 14,50 menit. Waktu tersebut lebih kecil daripada waktu yang disyaratkan Organisasi Maritim Internasional (60 menit). Potensi kepadatan penumpang atau jalur kritis dimulai pada pintu 1 ketika jalur tersebut dilalui oleh semua penumpang kelas ekonomi sebelum memasuki koridor 1 dan koridor 2. Jumlah penumpang yang terakumulasi pada lokasi tersebut adalah 72 orang pada detik ke-300. Selanjutnya kepadatan penumpang terjadi pada daerah pertemuan pergerakan penumpang yang menuju pintu darurat geladak, yaitu penumpang yang berasal dari koridor 3 dan koridor 4. Pada lokasi tersebut terjadi kepadatan penumpang yang mencapai 76 orang pada detik ke-490. Potensi lokasi atau titik kritis jalur evakuasi penumpang terjadi pada pertemuan antara dua atau lebih jalur evakuasi, khususnya pada lokasi transisi, seperti pada pintu, tangga, atau penyempitan jalur yang disebabkan jumlah penumpang yang besar. Kata-kata kunci: jalur evakuasi, lokasi kritis, waktu evakuasi, pintu darurat, kapal penyeberangan
WAKTU EVAKUASI MAKSIMUM PENUMPANG PADA KAPAL PENYEBERANGAN ANTAR PULAU Paroka, Daeng
Wave: Jurnal Ilmiah Teknologi Maritim Vol 7, No 2 (2013)
Publisher : Wave: Jurnal Ilmiah Teknologi Maritim

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (627.361 KB) | DOI: 10.29122/jurnalwave.v7i2.3200

Abstract

Korban jiwa pada kecelakaan kapal dapat terjadi akibat kesulitan untuk mengevakuasi penumpang akibat kepanikan, kelebihan penumpang serta dimensi serta rute dari jalur evakuasi yang tidak memungkinkan untuk mengevakuasi penumpang dalam waktu yang singkat.Paper ini mengevaluasi waktu evakuasi berdasarkan standar IMO apabila terjadi kebocoran satu atau beberapa kompartemen secara bersamaan. Waktu kebocoran diestimasi dengan memakai prinsip Bernoulli. Jalur evakuasi dianggap layak apabila waktu evakuasi yang dibutuhkan lebih kecil dari waktu kebocoran. Hasil perhitungan dan analisis menunjukkan bahwa kebocoran pada kompartemen tertentu dengan luas penampang bocor yang besar dapat mengakibatkan penumpang tidak dapat dievakuasi sebelum kapal kehilangan stabilitas atau tenggelaman. Oleh karena itu, penentuan jalur evakuasi hendaknya tidak hanya mempertimbangkan kasus kebakaran tetapi juga bentuk kecelakaan lain yang mungkin terjadi di kapal seperti masalah kebocoran
Maneuverability of Ships with small Draught in Steady Wind Paroka, Daeng; Muhammad, Andi Haris; Asri, Syamsul
Makara Journal of Technology Vol 20, No 1 (2016)
Publisher : Directorate of Research and Community Services, Universitas Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.7454/mst.v20i1.296

Abstract

Wind force and moment may force a ship to drastically decrease its speed and use a large drift angle as well as a large rudder angle in order to maintain its course. Shipswith a small draught might have more risk in maneuvering to its point of view compared with a ship with a larger draught. This paper discusses maneuverability of a ship with a small draught in steady wind. The effect of wind on ship speed, drift angle, and rudder angle are investigated in a steady state condition. Five different ratios of wind velocity to ship speed from 1.0 to 20.0 are used in the simulation. The variation in wind direction is examined from 0°to 180°. Results of the numerical simulation show that thewind has a significant effect on the reduction in ship speed with a wind direction less than 100°. The drift angle increases due to increasing wind velocity in the same wind direction. Wind direction also has a significant effect on the drift angle especially when the wind direction is less than 140°. The same phenomenon was found for the rudder angle. The necessary rudder angle is greater than the maximum rudder angle of the ship when the wind direction is 60°with a wind velocity to ship speed ratio of 20 or more.
ANALISIS LOKASI KRITIS JALUR EVAKUASI PENUMPANG KAPAL PENYEBERANGAN ANTAR PULAU DENGAN METODE PERGERAKAN SIMULTAN Muhammad, Andi Haris; Paroka, Daeng
Prosiding Forum Studi Transportasi Antar Perguruan Tinggi The 17th FSTPT of International Symposium
Publisher : FSTPT Indonesia

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Abstract

One of important factor to avoid accident fatalities of passanger vessel evacuation is the evacuation route design of safety. A number of critical locations can slow down the evacuation process such as doors, stairs and corridors essential for analysis. This paper discusses a number of critical locations, potential to evacuation failure, especially on ships crossing inter-islands. The method used to identify the critical location or locations where the concentration of passengers during the evacuation process is the Simultaneous Movement Method. The simulation results show that the total time required evacuation of passengers, especially on economy class of KMP Jatra II, since leaving the passenger compartment until all passengers are on the vehicle deck emergency exit is 870 seconds or 14.50 minutes, smaller than required by IMO ( 60 menit). Potential of passenger density or the critical path, starting at the 1st door where in the path traversed by all economy class passengers before entering the 1st and 2nd corridors. Maximum number of passengers that accumulates at these sites is 72 people on 300 seconds. Subsequently passenger’s concentration occurs at the meeting movement toward the passenger emergency exit vehicle deck that is derived from the 3rd and 4th corridors, at the location of a concentration of passengers up to 76 people on 490 second. This study suggests that the potential of location or critical point of the passenger evacuation path occurs at a meeting between two or more evacuation routes, especially in locations such as the transition to the doors, stairs or passenger traffic bottlenecks due to the larger capacity. The results of this analysis can also be used as a basis for determining an alternative evacuation route or routes change if the conditions are experienced during vessel operation.
Pengenalan Perangkat Keselamatan Sarana Pelabuhan Moda Waterway Sungai Tallo Makassar Rachman, Taufiqur; -, Juswan; Paroka, Daeng; Baeda, Achmad Yasir; Rachman, Sabaruddin; Paotonan, Chaerul; -, Hasdinar; MA, Muhammad Zubair; -, Ashury; Husain, Firman
JURNAL TEPAT : Teknologi Terapan untuk Pengabdian Masyarakat Vol 1 No 1 (2018): Teknologi untuk Masyarakat
Publisher : Faculty of Engineering UNHAS

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Abstract

Pengoperasian sebuah pelabuhan moda waterway harus memenuhi syarat adanya perangkat keselamatan yang memenuhi standar pelayanan sandar dan tambat secara layak dan aman bagi penumpang dan barang. Sarana pelabuhan dermaga 3 Lakkang yang melayani moda waterway Sungai Tallo dengan rute Kera-kera - Pulau Lakkang yang merupakan kawasan wisata sejarah ini tidak dilengkapi dengan perangkat keselamatan dan kondisi trestle dermaga 3 yang dibangun sejak tahun 2013 ini sudah mulai mengalami kerusakan. Hal ini mengakibatkan mutu pelayanan sandar dan tambat kurang aman ditinjau dari aspek keselamatan bongkar muat penumpang dan kendaraan roda dua. Sosialisasi kebutuhan perangkat keselamatan dan pemenuhan sarana pelabuhan yang layak dan aman secara mandiri perlu dilakukan dalam penerapan keselamatan sarana pelabuhan angkutan moda. Transfer pengetahuan melalui sosialisasi ini akan meningkatkan standar mutu layanan sandar dan tambat secara aman dan nyaman bagi penumpang dan barang angkutan moda waterway Sungai Tallo sesuai Peraturan Pemerintah Nomor 64 Tahun 2015 perubahan atas Peraturan Pemerintah 61 Tahun 2009 tentang kepelabuhanan. Sosialisasi dan perbaikan jembatan penghubung (trestle) dan geladak moda waterway kepada kelompok moda waterway ini dapat menambah keselamatan, keamanan, dan kenyamanan penumpang lokal dan pengunjung wisata Lakkang baik turis domestik maupun mancanegara dalam pelayaran dan proses bongkar dan muat waterway di dermaga 3 Lakkang. Respon positif diberikan oleh penumpang dan pemilik moda waterway. Mereka berharap bahwa kegiatan serupa yang memberi nuansa pengetahuan baru bagi kelompok moda waterway sebagai operator khususnya dan kepada khalayak warga Kelurahan Lakkang umumnya.
LOKASI KRITIS JALUR EVAKUASI PENUMPANG KAPAL PENYEBERANGAN ANTARPULAU DENGAN METODE PERGERAKAN SIMULTAN Muhammad, Andi Haris; Paroka, Daeng
Jurnal Transportasi Vol 15, No 2 (2015)
Publisher : Jurnal Transportasi

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (308.392 KB) | DOI: 10.26593/jt.v15i2.1730.%p

Abstract

Abstract One important factor to avoid casualties on a shipwreck is a safe evacuation route design. Number of locations that can slow the evacuation process, such as doors, stairs and corridors are essential for analysis. This paper discusses a number of critical locations that have the potential failure of evacuation, particularly in the inter-island ferry. The method used to identify the critical location or locations, where the density of passengers occurs during the evacuation process, is the Simultaneous Movement Method. The simulation results showed that the total time required to evacuate passengers was 870 seconds or 14.50 minutes. This time is much smaller than the time required by the International Maritime Organization (60 minutes). Potential passenger density or the critical path starts at the door 1 when the path traversed by all economy class passengers before entering the hall 1 and hall 2. The number of passengers that accumulates at these sites is 72 people on the 300th second. Furthermore, passenger density occurs at the meeting area of the movement passengers toward the exit deck, where the passengers come from the corridors 3 and 4. At that location the density of passengers reached 76 people in the 490th second. The potential location or the critical point of passenger evacuation path occurs at the junction between two or more evacuation lanes, especially in the transition location, such as at doors, stairs, or narrowing lane due to the large number of passengers. Keywords: evacuation lane, critical location, evacuation time, emergency exit, ferry  Abstrak Salah satu faktor penting untuk menghindari terjadinya korban jiwa pada suatu kecelakaan kapal adalah desain jalur evakuasi yang aman. Sejumlah lokasi yang dapat memperlambat proses evakuasi, seperti pintu-pintu, tangga, dan koridor penting untuk dianalisis. Makalah ini membahas sejumlah lokasi kritis yang berpotensi terjadinya kegagalan evakuasi, khususnya pada kapal penyeberangan antarpulau. Metode yang digunakan untuk mengidentifikasi lokasi kritis atau lokasi tempat terjadinya kepadatan penumpang selama proses evakuasi adalah Metode Pergerakan Simultan. Hasil simulasi menunjukkan bahwa total waktu evakuasi yang diperlukan penumpang adalah 870 detik atau 14,50 menit. Waktu tersebut lebih kecil daripada waktu yang disyaratkan Organisasi Maritim Internasional (60 menit). Potensi kepadatan penumpang atau jalur kritis dimulai pada pintu 1 ketika jalur tersebut dilalui oleh semua penumpang kelas ekonomi sebelum memasuki koridor 1 dan koridor 2. Jumlah penumpang yang terakumulasi pada lokasi tersebut adalah 72 orang pada detik ke-300. Selanjutnya kepadatan penumpang terjadi pada daerah pertemuan pergerakan penumpang yang menuju pintu darurat geladak, yaitu penumpang yang berasal dari koridor 3 dan koridor 4. Pada lokasi tersebut terjadi kepadatan penumpang yang mencapai 76 orang pada detik ke-490. Potensi lokasi atau titik kritis jalur evakuasi penumpang terjadi pada pertemuan antara dua atau lebih jalur evakuasi, khususnya pada lokasi transisi, seperti pada pintu, tangga, atau penyempitan jalur yang disebabkan jumlah penumpang yang besar. Kata-kata kunci: jalur evakuasi, lokasi kritis, waktu evakuasi, pintu darurat, kapal penyeberangan
MANEUVERING PERFORMANCE OF A 30 GT FISHING VESSEL WITH ASYMMERICAL PROPELLER CONFIGURATION Muhammad, Andi Haris; Syarifuddin, .; Paroka, Daeng; Rahman, Sabaruddin; Wisyono, .; Pratama, Andi Angga
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol 9, No 2 (2017): Elektronik Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (71.575 KB) | DOI: 10.29244/jitkt.v9i2.19314

Abstract

Fishing vessels are designed with a specific mission. That mission is to locate, catch, and preserve fish while out at sea, meanwhile the vessel needed to have good maneuverability. This research describes a study on asymmetrical propeller configuration of a fishing vessel to improve its maneuvering quality. MATLAB-simulink program was used to simulate, the turning circle and the zigzag maneuvers. The simulation program was developed based on the mathematical model for a fishing vessel maneuvering. The mathematical model involved the setting-up a 3 DOF (Degres of Freedom) mathematical model in a modular of MMG (Mathematical Modeling Group) of the hull, propeller and rudder component. The result indicated that twin propeller with asymmetrical had an advantages of turning circle ability of 8% to 14 %, meanwhile the zigzag maneuver 20°/20° had 9 to 20 % 1st overshoot different between left and right heading.                                                                                         Keywords: Configuration, propeller, assymetrical, fisheries, simulation
FATIGUE ANALYSIS OF CATENARY MOORING SYSTEM DUE TO HARSH ENVIRONMENT IN FOLLOWING SEAS Assidiq, Fuad Mahfud; Paroka, Daeng; Alie, Muhammad Zubair Muis; Klara, Syerly
Jurnal Indonesia Emas PPI Dunia Vol 1 No 01 (2018): OISAA Journal of Indonesia Emas
Publisher : PPI Dunia

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Abstract

In the operation, Floating Production Unit (FPU) will get dynamic loads on the structure periodically such as the mooring line responses. The aim of the present study to discuss fatigue life on catenary mooring system refers to the comparison of using or without using the Single Line Freestanding Riser (SLFR), the operational design and installation conditions at FPU Gendalo-Gehem and located in the Makassar Strait using the six-strand wire rope with 0,115 meters outer diameter and 1.200 meters length will be fatigue life analysed. The FPU motion observation shows the highest Response Amplitude Operator (RAO) surge, sway, heave, roll, pitch, and yaw motion due to harsh environments are 0,615 m/m, 1,01x10-6 m/m, 1,048 m/m, 1,14x10-5 0/m, 2,23 0/m, and 9,08x10-8 0/m. It means that the amplitude response will always be smaller than the wave amplitude coming up. Taking into RAO motion calculation, the fatigue life on catenary mooring systems for following seas are 445 years in mooring line 1 and mooring line 8 with using SLFR while without using SLFR for 5.461 years in mooring line 1. The structure is still in safe condition because of the design safety factor about 300 years.