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All Journal Jurnal Techno Bahari Indonesian Journal of Maritime Technology or abbreviated (ISMATECH)
Cindy Lionita Agusty
Institut Teknologi Kalimantan
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Electrical & Electronics Engineering Energy Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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Bottom Slamming ; Deck Wetness; Analisis Dinamika Kapal Ikan Berlambung Katamaran terhadap Fenomena Bottom Slamming dan Deck Wetness Chris Jeremy Verian Sitorus; Wira Setiawan; Alamsyah; Muhammad Anjas Syam; Cindy Lionita Agusty; Jusma Wahidah; Hariyono; Harlian Kustiwansa; Husein Syahab; Fernanda Wahyu Pratama; Irham Bahri
Techno Bahari Vol. 12 No. 1 (2025): Maret
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i1.346

Abstract

The lack of consideration for safety in fishing boat design, as builders primarily focused on maximizing catch. It was necessary to calculate deck wetness and bottom slamming to prevent dangerous conditions in rough weather. This study aimed to determine the RAO values of a catamaran fishing boat at wave angles of 0°, 90°, 135°, and 180°, and to calculate the probability of bottom slamming and deck wetness. The RAO calculation used an optimization method with Maxsurf software for load variations of 25% DWT, 50% DWT, and 100% DWT. The results showed that the highest heave amplitude occurred at 100% DWT, 6.45 knots, and a 0° wave angle, measuring 0.131 meters. The highest pitch amplitude was 2.02 degrees under the same conditions, while the highest roll amplitude occurred at 50% DWT, 6.45 knots, and a 90° wave angle, reaching 3.43 degrees. The probability of deck wetness was 0.24%, and bottom slamming was 0.0000000014996%, both meeting NORDFORSK 1987 standards.
The Impact of Adding Stringer Elements to Barge Decks on Global Stress Values Cindy Lionita Agusty; Alamsyah; Amalia Ika Wulandari; Wahyu Dhono Saputra
Techno Bahari Vol. 12 No. 2 (2025): Oktober
Publisher : Politeknik Negeri Madura

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.52234/tb.v12i2.352

Abstract

Ship construction includes three main types of construction, namely longitudinal construction, transverse construction, and mixed construction. The longitudinal construction of the ship is subjected to truss loads and is depicted in the rigid transverse joints of the ship with the aid of longitudinal beams. Senta side or stringer is a longitudinal support made of profile steel and faceplate, mounted on both sides of the inside of the ship's hull. There was a case of a barge with a broken hull because it did not have a side beam or stringer. This study aims to determine the maximum stress due to the addition of a side beam or stringer to the barge. The method used is finite element with the help of Ansys Mechanical Research software. In this study, the maximum stress that occurred on the 1 stringer barge was 96.96 N/mm² (hogging) and 62. 20 N/mm² (sagging). While on the 2 stringer barge it is 96.86 N/mm² (hogging) and 62.71 N/mm² (sagging). The percentage of voltage drop after the addition of a stringer is ± 30% with a safety factor in the range of 1.55 ~ 2.41.
Conceptual and Preliminary Design Innovation of a Multipurpose Palm Fruit Vessel for Inland Plantation Waterways in Muara Kaman Suardi Suardi; Jamal Jamal; Arwis Irmandana; Alamsyah Alamsyah; Wira Setiawan; Chris Jeremy Verian Sitorus; Jusma Wahidah; Cindy Lionita Agusty; Faisal Mahmuddin
Indonesian Journal of Maritime Technology Vol. 4 No. 1 (2026): Volume 4 Issue 1, June 2026
Publisher : Naval Architecture Department, Kalimantan Institut of Technology

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35718/ismatech.v4i1.8481848

Abstract

Oil palm fruit production in East Kalimantan continues to increase in line with high market demand. This situation demands efficient transportation facilities to transport the harvest from plantation areas. Furthermore, annual forest fires, particularly in peatland areas, are often difficult to manage due to limited land access. Based on these two challenges, this study proposes the design of a multipurpose vessel capable of both transporting oil palm fruit and supporting firefighting. The vessel is designed with main dimensions of L = 20 m, B = 4.9 m, H = 2 m, T = 1.5 m, and an operating speed of 8 knots. The cargo hold has a carrying capacity of 67.3 tons with a single trip distance of 12.3 km. The main innovation developed is a conveyor belt with hydraulic arms to increase the efficiency of the oil palm fruit loading and unloading process in the plantation area. Furthermore, the vessel is equipped with an external firefighting system with a capacity of 90 m³/hour with a horizontal spray range of 30 meters and a vertical height of 20 meters. The fire monitor operates using 7 kW of power to generate sufficient pressure to extinguish fires in areas difficult to reach from the riverbank. This multipurpose vessel is designed to provide an integrated solution for the oil palm plantation logistics chain while improving the response to forest fires in the Muara Kaman District.
Co-Authors Alamsyah Amalia Ika Wulandari Arwis Irmandana Chris Jeremy Verian Sitorus Faisal Mahmuddin Fernanda Wahyu Pratama Hariyono Harlian Kustiwansa Husein Syahab Irham Bahri Jamal Jamal Jusma Wahidah Muhammad Anjas Syam Suardi Suardi Wahyu Dhono Saputra Wira Setiawan