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Abstrak :
Ketika suatu kapal dilakukan kegiatan stevedoring atau bongkar muat suatu muatan, maka kondisi stabilitas kapal akan berubah karena adanya perubahan karaktersitik lambung kapal. Untuk memonitor kondisi stabilitas kapal selama stevedoring berlangsung, maka pada penelitian ini akan dilakukan perancangan tools yang dapat memonitor kondisi stabilitas kapal ketika pemuatan container ke atas kapal sedang berlangsung. Dengan penggunaan tools tersebut, pengguna dapat mengetahui kondisi stabilitas kapal secara real time, seperti Kurva GZ, draught haluan, draught buritan, portside draught, starboard draught, nilai GM, dan lain-lain. Tujuan dari penelitian ini adalah membuat tools yang dapat menghitung dan menganalisis stabilitas kapal ketika proses stevedoring berlangsung secara real time dan membuat user interface/antarmuka yang dapat menampilkan kondisi stabilitas kapal secara real time ketika proses stevedoring. tools ini menggunakan platform yang dikeluarkan oleh Google, yaitu Google Form yang digunakan untuk menginput data operasional, Google Sheets yang digunakan untuk menghimpun dan mengolah data hingga didapatkan hasil perhitungan stabilitas kapal, Google Drive untuk menyimpan gambar desain kapal 2D, Google App Script yang digunakan untuk melakukan proses coding pada bagian user interface, dan Google Sites yang digunakan sebagai user interface dalam menampilkan data hasil akhir perhitungan yang dilakukan oleh tools. Kemudian, dilakukan pengujian tools dalam 4 kondisi yang berbeda, yaitu kondisi kapal kosong, kondisi voyage 05A, kondisi voyage 06a, dan kondisi GM negatif. Pada kondisi kapal kosong, didapati hasil perhitungan nilai draught (nilai error) pada bagian haluan, midship, dan buritan sebesar 0.79 m (2.1 %), 1.71 m (0.23 %), dan 2.63 m (0.9 %). Sedangkan pada kondisi voyage 05A didapatkan hasil perhitungan nilai draught (nilai error) pada bagian haluan, midship, dan buritan sebesar 5,70 m (1.95 %), 5.62 m (1.31 %), dan 5.54 m (4.46 %). Serta pada kondisi voyage 06A yang diperoleh hasil perhitungan nilai draught (nilai error) pada bagian haluan, midship, dan buritan sebesar 5.76 m (2.06 %), 5.78 m (0.69 %), dan 5.80 m (3.28 %). Selain itu, pada kondisi GM negatif menghasilkan kurva dimana nilai GZ menjadi negatif. ......When a ship is carried out stevedoring, the condition of the ship's stability will change due to changes in the characteristics of the ship's hull. To monitor the condition of the stability of the ship during stevedoring, this research will design tools that can monitor the condition of the stability of the ship when loading or unloading containers is in progress. By using these tools, users can find out the stability condition of the ship in real time, such as the GZ curve, fore draft, after draft, portside draft, starboard draft, GM value, and others. The purpose of this study is to create tools that can calculate and analyze ship stability when the stevedoring process takes place in real time and create a user interface that can display the ship's stability condition in real time during the stevedoring process. This tool uses a platform issued by Google, namely Google Form which is used to input operational data, Google Sheets which is used to collect and process data until the results of the calculation of ship stability are obtained, Google Drive which is used as Google App Script which is used to perform the coding process on the user interface, and Google Sites which is used as a user interface in displaying the final data of the calculations performed by the tools. Then, the tools were tested in 4 different conditions, namely the empty ship condition, 05A voyage condition, 06a voyage condition, and negative GM condition. In the condition of an empty ship, the results of the calculation of the draft value (error value) on the fore, midship, and after were 0.79 m (2.1 %), 1.71 m (0.23 %), and 2.63 m (0.9 %). While in the 05A voyage condition, the calculation results of the draft value (error value) on the fore, midship, and after sections were 5.70 m (1.95 %), 5.62 m (1.31 %), and 5.54 m (4.46%). And in the 06A voyage condition, the calculation results of the draft value (error value) on the fore, midship, and after were 5.76 m (2.06 %), 5.78 m (0.69 %), and 5.80 m (3.28%). In addition, the negative GM condition produced a curve where the GZ value became negative.

Abstrak :
This book contains a selection of research papers presented at the 11th and 12th International Ship Stability Workshops (Wageningen, 2010 and Washington DC, 2011) and the 11th International Conference on Stability of Ships and Ocean Vehicles (Athens, 2012). The book is directed toward the ship stability community and presents innovative ideas concerning the understanding of the physical nature of stability failures and methodologies for assessing ship stability. Particular interest of the readership is expected in relation with appearance of new and unconventional types of ships; assessment of stability of these ships cannot rely on the existing experience and has to be based on the first principles. As the complexity of the physical processes responsible for stability failure have increasingly made time-domain numerical simulation the main tool for stability assessment, particular emphasis is made on the development an application of such tools. The included papers have been selected by the editorial committee and have gone through an additional review process, with at least two reviewers allocated for each. Many of the papers have been significantly updated or expanded from their original version, in order to best reflect the state of knowledge concerning stability at the time of the books publication. The book consist of four parts: Mathematical Model of Ship Motions in Waves, Dynamics of Large Motions, Experimental Research and Requirements, Regulations and Operations.

Abstrak :
Alat uji stabilitas merupakan alat yang mempermudah mahasiswa dalam memahami stabilitas kapal. Pengujian dilakukan pada model kapal dengan sudut kecil yaitu tidak lebih dari 5 derajat. Prosedur pengujian dimulai dengan meletakkan beban yang sama pada startboard side dan port side masing-masing 3 buah dan kemudian memindahkan satu persatu beban ke sisi sebelahnya, lalu beban tersebut dikembalikan ke posisi awal. Penggantian dynamometer dengan clinometer digital membuat besar sudut pengujian bisa langsung terbaca. Righting arm hasil pengujian kemudian dibandingkan dengan hasil yang diperoleh dari cross curve. Righting arm yang diperoleh menunjukkan pengujian dengan clinometer digital harus disempurnakan lagi.

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Ship stability testing device is a kind of device that help student in understanding ship stability. Experiment is done to the model with small angle degree which is not greater than 5 degrees. Procedure experiment is start by putting three weights on start board side and port side. Then weights are moved to opposite side one by one and then it moves back to origin position. Changing dynamometer with clinometer make experiment result can read instantly. Righting arm which is result of experiment then compared with calculation from cross curve. The result shows that inclining test experiment using clinometer need improvement.