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Muhammad Akbar Asis
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ijm-nasp@unhas.ac.id
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International Journal of Metacentre
Published by Universitas Hasanuddin
ISSN : -     EISSN : 28098307     DOI : -
Core Subject : Engineering,
Engineering Transportation
The International Journal of Metacentre (IJM) is addressed to scientists and professionals to share their experience, expert knowledge and research results, concerning all aspects of maritime application, technology, engineering, science, and transportation. Focus and Scope Articles that can be published in this journal are the results of research, scientific studies/results of thought, and analysis/problem-solving in the field of naval architecture in particular and maritime and marine technology in general. Scientific articles can be in the form of research results, original research articles, reviews, scientific studies. Based on the focus and scope of the journal, the articles that can be loaded in this Journal cover 10 things (including other fields that are still in relation to marine & maritime technology), namely: Ship Hydrodynamics Ship Design and Production Ship Structure Naval and Marine System Marine Engineering Ship Material Marine Transport Engineering Ocean Renewable Energy Ocean and Offshore Engineering Coastal & Port Management
Arjuna Subject : Teknik (semua kategori) - Teknik (Lain-Lain)
Articles 4 Documents
 1 
Design of Shipping Lanes at Tanjung Ringgit Port Palopo City
International Journal of Metacentre Vol. 2 No. 1 (2022): June 2022
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

One of the things that should not be left behind in the port development process is the availability of shipping lanes. The shipping lane is used to direct ships that will leave/enter the harbor pool. The shipping lane must have sufficient depth and width or in accordance with the draft of the ship so that it can be passed by ships that will use the port. This study aims to determine the characteristics of the shipping lanes in accordance with the needs of the ship and determine the location of the appropriate and efficient shipping lanes at Tanjung Ringgit Port, Palopo City. The method used to design the shipping lanes of Tanjung Ringgit Port, Palopo City, is by observation/survey, interview, and document study. The results of this study indicate that there is a navigational hazard, namely seaweed ponds for local residents, therefore the addition of Sailing Navigation Assistance Facilities in the form of 3 units of Red Flare Buoys. The depth at the entrance of the Tanjung Ringgit Port, Palopo City, starts from 9 meters – 23 meters with a channel length of 6,074 meters and a channel width of 300 meters so that a route system for the inlet and exit routes is made with a 2-way route system. Based on these results, the size of the ship with a DWT of 8000 tons, a maximum draft of 8.1 meters with an LOA of 100 meters that can enter and leave the shipping lane. The depth of the waters in front of the pier of Tanjung Ringgit Port, Palopo City is 7 meters. There is a water area for the activities of the main facilities for port services, namely, Swivel Pool, Ship to Ship Area, and Freight Ship Anchoring Area. And there are water areas for port service supporting facilities activities, namely, Dead Ship Area, Sea Trial Area, Emergency Area, Reserve Area. Keywords: Area; Shipping Line
The Optimal Capacity of the Handling Facilities in Bitung Container Terminal
International Journal of Metacentre Vol. 2 No. 1 (2022): June 2022
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

The Bitung container terminal as the international hub port experienced an increase in the growth of container flow and ship call from 2014 to 2019, wherein the average increase was 8% and 4%, respectively. In 2018, the increase of ship calls was significantly high about 25% compared with the ship call in 2017. One of the important port facilities, to support the loading and unloading activities for the container, is the container handling types of equipment that are used for container handling from ship to port, port to the container terminal, and in the container terminal itself. The aims of this study are to analyze the productivity performance of the container handling equipment in the Bitung container terminal by considering the growth of container flow and to determine the optimal capacity of the container handling capacity for the expected year in 2035. The container handling equipment that was investigated is a container crane (CC), rubber-tired gantry (RTG), and head track (HT). The combination of the qualitative and quantitative methods is used for analyzing the productivity, and the regression method is used for predicting the growth of the container. Also, the optimization method is used for determining the optimal capacity of the container handling equipment. The research results revealed the productivity of CC, RTG, and HT were 25 boxes/hour, 27 TEUS/hour, and 24 TEUS/hour, respectively. In addition, the optimal capacity of CC is one unit for the short term (2025) and mid-term (2035). The optimal capacity of RTG is two units for the short-term (2025) and mid-term (2035). For the HT, the optimal capacity is two units for the short-term (2025) and mid-term (2035).
The Design of Digital of information System For Shipbuilding Proccess : Current Condition of Medium Shipyard
International Journal of Metacentre Vol. 2 No. 1 (2022): June 2022
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

In the era of the industrial revolution 4.0, information technology is developing very rapidly so that it is now easier to design an information system that can facilitate aspects of work. The ship production process in a shipyard involves complex information. It's the necessary information to keep the shipbuilding project progress with the Plan. Unclear information at least one of the stages in the ship production process will delay project completion and affect costs. Manually distributing important information about the shipbuilding process to related departments takes time. Therefore, it directly affects the duration of the project. A digital information system for the shipbuilding process is needed to overcome these problems. Therefore, it is necessary to develop an integrated information system that functions to facilitate the flow of information between divisions related to the ship production process in the form of digitization. Based on this, there has been no digitalization of information system integration related to production materials in the design division (Engineering), purchasing division, material warehouse division and production division. Therefore, before the digital information system can be developed further, it is necessary to identify and formulate the flow of information between departments. Therefore, this study aims to identify and formulate information and flows to the four divisions in the ship production process .
An Experimental Study on Stern Slamming of a Ship with Steel Model
International Journal of Metacentre Vol. 2 No. 1 (2022): June 2022
Publisher : Naval Architecture Departement, Hasanuddin University

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Abstract

This study discusses the phenomenon of experimental-based slamming carried out on a towing tank using a piezo sensor placed on a 0.15 L plane measured from the AP. This research measures the pressure on the ship's hull and internal strain with a steel model. This study aims to determine the amount of pressure and distribution on the ship's hull and the internal strain that occurs. This study's results indicate that the value of internal stresses and strains increases with each increase in the aft angle given in the drop test. The greatest pressure occurs at sensor 2 in the bottom area, which first touches the water surface with an average increase in pressure of 23.89% and internal strain occurs at sensor 6 in the ivory construction at the stern of the ship with an average increase of 24.49% so that These areas need special attention in Typical frame section location for stren slamming and structure of the ship to minimize the damaging effects of the slamming phenomenon.

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