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All Journal KAPAL Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Journal of Marine-Earth Science and Technology
Aditya Dwi Saputra, Aditya Dwi
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Earth & Planetary Sciences Energy

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A Comparative Analysis of the Stability of Open-Deck River Boats Using Righting Moment and GM0 Based Criteria Hasanudin, Hasanudin; Saputra, Aditya Dwi; Yulianto, Ardi Nugroho; Sujantoko, Sujantoko
Kapal: Jurnal Ilmu Pengetahuan dan Teknologi Kelautan Vol 22, No 2 (2025): June
Publisher : Department of Naval Architecture - Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/kapal.v22i2.70447

Abstract

The Musi River is an important transportation route in Indonesia, where traditional boats such as Jukungs and Keteks are widely used. Both are open-deck vessels, making stability a crucial factor for safety and operability. This study analyses and compares the stability of a Jukung and a Ketek in order to provide insights for safer traditional boat design. The methodology involves calculating the stability moment (MGZ) at a given heel angle and the heeling moment (MKR) due to turning and passenger distribution, based on Biro Klasifikasi Indonesia (BKI) and the GM₀ value specified by International Maritime Organization (IMO). Numerical simulations based on hull geometry are also applied for a more detailed assessment. Although similar in size, the Jukung has greater displacement owing to its flat U-shaped hull extending from top to bottom. Reducing passenger loads lowers the centre of gravity and increases the height of the righting lever. Both boats satisfy stability criteria across loading cases; however, the Jukung consistently demonstrates higher MGZ values, which increases further as the load decreases. Findings show that both vessels remain stable with MGZ exceeding MKR. The Jukung maintains a positive GM₀ under all loading conditions, whereas the Ketek fails to meet stability requirements at higher loads but is acceptable at reduced passenger levels. Overall, the Jukung proves more stable and safer, with its hull form providing a larger righting lever and greater safety margin than the Ketek. This highlights the critical role of hull design in ensuring traditional boat safety along the Musi River.
DESIGNING A BOAT HOTEL (BOTEL) FOR MARINE TOURISM ON TABUHAN ISLAND, BANYUWANGI REGENCY, EAST JAVA H, Hasanudin; Nasirudin, Ahmad; Saputra, Aditya Dwi
Journal of Marine-Earth Science and Technology Vol. 4 No. 1 (2023): April
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v4i1.675

Abstract

Tabuhan Island is one of the tourist islands in Banyuwangi Regency, which in 2020 was proclaimed by the Banyuwangi Regency government to become an international tourist destination. One of the efforts needed to make an international-class destination is to complete tourist objects with good infrastructure. One of the infrastructures that need to be completed is resorts and hotels. Design of Boat Hotel Catamaran (Botel Catamaran) is innovated with facilities equivalent to a 3-star hotel following the Ministry of Tourism and Creative Economy standards. This selection uses general dimension design parameters, which are then used in extensive travel and Botel facilities. Based on the calculations, the converted resistance of the engine has met the required power of 156 Hp. In addition, the calculation of the displacement-weight difference also showed a result of <9%, meeting the small ship margin requirement. The trim calculation also met SOLAS regulations with a result of 0% LWl < trim < 0.5% LWl. The freeboard calculation also met NCVS regulations with a result of Fb<(H-T). The tonnage calculation showed GT<500 GT, allowing the application of NCVS regulations. Finally, the comfort calculation (MSI) met the applicable ISO regulations. With these standardized calculation results, the engine is expected to operate optimally and safely. It was found that this ship has the final main dimensions, namely LoA = 29.26 m; Lpp = 28 m; B = 11.5 m; Height = 4 m; T=1.1m; B1 = 2.77; S = 6 m2 with a total of 6 rooms with a size of 30 m2 each and has been equipped with a restaurant and lounge. Then, the outline plan, general plan, and 3D model are drawn.
Co-Authors Ardi Nugroho Yulianto H, Hasanudin Hasanudin Hasanudin Nasirudin, Ahmad Sujantoko Sujantoko