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"ABSTRAK Indonesia sebagai negara maritim memerlukan sistem pertahanan laut yang handal. Keterbatasan armada maupun luas laut yang rawan terjadi tindak kejahatan menjadi konsen masalah maritim di Indonesia. Laut-Laut terluar di Indonesia tidak luput dari berbagai kejahatan seperti illegal fishing maupun penyelundupan. Pangkalan laut kini menjadi hal yang menarik bagi sistem maritim dalam menyokong pertahanan laut. Mooring buoy dapat didesain untuk keperluan khusus seperti pangkalan laut sederhana sehingga memudahkan kapal-kapal patrol untuk tambat di daerah sekitar operasi. Dalam merancang mooring buoy system ini menggunakan persamaan catenary sebagai perhitungan rantai. Ketentuan desain menggunakan quasy-static sebagai model perhitungan beban pada buoy dan kapal. Lokasi penambatan mooring buoy yang dipilih yaitu laut Natuna. Hasil perancangan yaitu konfigurasi mooring line yang digunakan yaitu konfigurasi 4-4 dan beban maksimum lingkungan pada sistem yaitu sebesar 409,936 N.

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ABSTRACT

Indonesia as maritime country should have reliable marine defense system. The limitations of the fleet and the vastness of the sea are prone to crime to be the problem of maritime issues in Indonesia. The outer seas in Indonesia do not escape from various crimes such as illegal fishing and smuggling. Sea bases are now an interesting thing for the maritime system in supporting sea defense. Mooring buoys can be designed for special purposes such as simple sea bases that make it easier for patrol boats to moor in the area around the operation. In designing the mooring buoy system, catenary equations are used as chain calculations. The design requirement uses quasy static as a model of load calculation on buoy and ship and mooring buoy mooring located at Natuna seas. The design result is the configuration of mooring line that is used is configuration 4 4 and maximum load of environment at system that is equal to 409,936 N. "

"ABSTRAKIndonesia merupakan negara maritim dengan kekayaan laut berupa ikan yang belum dapat sepenuhnya memanfaatkan seluruh jumlah tangkapan ikan di Zona Ekonomi Eksklusif Indonesia. Salah satu cara meningkatkan produksi ikan dalam negeri adalah dengan metode offshore aquaculture, yaitu budidaya perikanan atau produksi ikan dan hewan laut lainnya di laut lepas yang tetap terkendali. Studi analisis ini bertujuan menganalisis desain offshore aquaculture milik SalMar ASA apakah dapat digunakan di perairan laut Indonesia. Perancangan Offshore Aquaculture dalam tugas akhir ini berjenis semi-submersible rigid cages. Pengoperasian dilakukan di daerah lepas pantai barat Sumatra dengan kondisi setengah terapung, sehingga dilakukan analisis sistem ballast dan sistem mooring untuk menjaga offshore aquaculture tetap pada posisinya. Hasil analisis desain menunjukkan bahwa volume air yang dibutuhkan offshore aquaculture untuk tenggelam sebesar 31147 m3. Jumlah pompa yang dibutuhkan yaitu 12 buah dengan masing-masing pompa memiliki kemampuan mengalirkan debit sebesar 2855.14 m3/h. Tali tambat yang digunakan untuk struktur keramba ini memiliki tegangan maksimal sebesar 1960.78 kN. Kesimpulan dari penelitian ini adalah offshore aquaculture milik SalMar ASA dapat dioperasikan di perairan laut Indonesia dengan beberapa perubahan pada sistem ballast dan sistem mooringnya.

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ABSTRACT

Indonesia is a maritime country with a maritime wealth of fish that has not been able to fully utilize all fish catches in Indonesia rsquo s Exclusive Economic Zone. One of the way to increase domestic fish production is by offshore aquaculture method, which is an aquaculture cultivation or fish production and other marine animals in the high seas that is executed under full control. This study is conducted to analyze the design of offshore aquaculture from Salmar ASA that can be operated on Indonesia rsquo s ocean The design of the offshore aquaculture used this study is the semi submersible rigid cases. The operation is carried out in the offshore of West Sumatran shore with a half afloat condition, thus, analysis of the ballast and mooring system is conducted to keep the offshore aquaculture stays in position. The result of the study showed that the water volume needed to sink the offshore aquaculture is 31147 m3. 12 pumps are needed with the ability of each pump to drain on water is 2855.14 m3 h. The mooring rope used for this offshore aquaculture has a maximum tension of 1960.78 kN. The result of this study suggested that offshore aquaculture from SalMar ASA can be operated on Indonesia rsquo s ocean with some changes in ballast system and mooring system."

"[Salah satu cara untuk mengekspansi penggunaan Energi Panas Bumi secara bersih dan meminimalisir dampak negatif terhadap lingkungan dengan memaksimalkan pemanfaatan sumber daya alam yang tersedia. Membuka kemungkinan lain dari penggunaan konstruksi Bangunan Lepas Pantai sebagai Pembangkit Listrik Tenaga Panas Bumi Terintegrasi. Dengan konstruksi berbasis pada Truss Spar Platform, Pembangkit Listrik Tenaga Panas Bumi Lepas Pantai ini berlokasi di Gunung Laut Kawio Barat, Perairan Sangihe Talaud, Sulawesi Utara, Indonesia. Platform yang memiliki Displacement sebesar 201556 DWT menggunakan 12 Mooring Lines, dengan sistem pertambatan Taut dan kalibrasi chain-polyester-chain. Chain dengan Grade 4 (K4 Studless Chain) berdiameter 5” dan Polyester High-Tech Fibre Ropes berdiameter 11”. Didapatkan hasil Gravity Loads sebesar 201556 N, Resistant Loads 3715.9 N, Current Drag 321448.04, Lift Force 1125068.16 N, Steady and Dynamic Wind Loads on Structures 457520.05 N, Impulse Load (Wave Slamming Load 6.23 N.

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Breaking Wave Loads 873.84 N; Wave Run-Up Loads 0.766 N). Analisis RAO (Response Amplitude Operator) terhadap struktur terlampir dalam bentuk grafik. Konversi Energi pada Power Plant dengan siklus Rankine, memiliki kalibrasi 2 set turbine untuk menghasilkan power sebesar 80MW, dengan efisiensi thermal sistem sebesar 60%. Dan Mooring Tension yang terjadi di setiap Mooring Lines masih memiliki nilai yang berada dibawah Allowable Tension, sehingga desain Mooring Lines aman untuk digunakan pada Platform.

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One way to expand the use of geothermal energy which clean and minimalizing the negative impacts to the environments by the maximizing the utilization of available resources. Open up another possibility of using the Offshore Constructions for an Integrated Offshore Geothermal Power Plant. With constructions based on Truss Spar Platform, the Offshore Geothermal Power Plant 8 x 80 MW are located in Kawio Barat Seamount, Sangihe Talaud Seas, North Sulawesi, Indonesia. The platform which has the displacement is about 201556 DWT are using the 12 Mooring Lines, with Taut Mooring System and calibrations are chain-polyester-chain. The chain is Grade 4 (K4 Studless Chain) with diameter 5” and Polyester High-Tech Fibre Ropes with diameter 11”. The calculation resulted are 201556 N for Gravity Loads, 3715.9 N for Resistant Loads, 321448.04 for Current Drag, 1125068.16 N for Lift Force, 457520.05 N for Steady and Dynamic Wind Loads on Structures, Impulse Load (Wave Slamming Load 6.23; Breaking Wave Loads 873.84 N; Wave Run-Up Loads 0.766 N). RAO (Response Amplitude Operator) analysis concerning to the structure are proven in graph. Energy Conversion in Power Plant with Rankine cycle, have 2 sets of turbine calibrations to produce 80MW of power, with the thermal efficiency is 60%. And Mooring Tension that occurs in each Mooring Lines are still in the under of Allowable Tension, so that the Mooring Lines Design are safe to be used on the Platform., One way to expand the use of geothermal energy which clean and minimalizing the negative impacts to the environments by the maximizing the utilization of available resources. Open up another possibility of using the Offshore Constructions for an Integrated Offshore Geothermal Power Plant. With constructions based on Truss Spar Platform, the Offshore Geothermal Power Plant 8 x 80 MW are located in Kawio Barat Seamount, Sangihe Talaud Seas, North Sulawesi, Indonesia. The platform which has the displacement is about 201556 DWT are using the 12 Mooring Lines, with Taut Mooring System and calibrations are chain-polyester-chain. The chain is Grade 4 (K4 Studless Chain) with diameter 5” and Polyester High-Tech Fibre Ropes with diameter 11”. The calculation resulted are 201556 N for Gravity Loads, 3715.9 N for Resistant Loads, 321448.04 for Current Drag, 1125068.16 N for Lift Force, 457520.05 N for Steady and Dynamic Wind Loads on Structures, Impulse Load (Wave Slamming Load 6.23; Breaking Wave Loads 873.84 N; Wave Run-Up Loads 0.766 N). RAO (Response Amplitude Operator) analysis concerning to the structure are proven in graph. Energy Conversion in Power Plant with Rankine cycle, have 2 sets of turbine calibrations to produce 80MW of power, with the thermal efficiency is 60%. And Mooring Tension that occurs in each Mooring Lines are still in the under of Allowable Tension, so that the Mooring Lines Design are safe to be used on the Platform.]"