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Shanis Irsamayanti
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Journal of Marine-Earth Science and Technology
Published by Institut Teknologi Sepuluh Nopember Surabaya
ISSN : -     EISSN : 27745449     DOI : https://doi.org/10.12962/j27745449
Core Subject : Science,
Earth & Planetary Sciences Energy
In the fast-growing of science and technology of marine-earth related topics, we would like to launch a new international journal entitled MarineEarth Science and Technology Journal (JMEST). This journal is aimed as a media communication amongst scientists and engineers in the fields of marine and earth science and technology and will receive research and technical papers to be reviewed by our editors and reviewers. The JMEST issued three times a year and each issue consists of 5 (five) papers. The scope of the journal includes (but not limited to): Geology, Geophysics, Geochemistry, Atmospheric Science, Environmental Science, Hydrology, Geothermal, Marine Engineering, Marine Technology, Underwater Technology, Marine Renewable Energy
Arjuna Subject : Ilmu Bumi dan Planet (semua kategori) - Teknik Geologi dan Geologi Teknik
Articles 76 Documents
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COMPARATIVE ANALYSIS OF INAPORTNET APPLICATION SYSTEMS AGAINST PORTBASE TO IMPROVE PORT PERFORMANCE IN INDONESIA Rasyad, Lucky; Andy, Fitri; Sumanta, I Gusti Ngurah
Journal of Marine-Earth Science and Technology Vol. 4 No. 3 (2023): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v4i3.1063

Abstract

Inaportnet is a digital system used to facilitate operational systems at Indonesian ports whose system is similar to the portbase in the Netherlands which also has the same function and purpose. The main aim of this research is to compare the level of effectiveness and efficiency of the Inaportnet work sys-tem which is considered to be still far from the Portbase work system which has been proven operationally quite effective in Dutch ports based on primary data collected from interviews with the Dutch Portbase and also Inaportnet Indonesia. In the interview results, significant differences were found in the way these two systems work where Portbase prioritizes security by carrying out two-step verification to prevent data leaks and also the possibility of sys-tem hacking. On the other hand, Inaportnet has not done this so it has the po-tential to experience disruption when the system is not available and creates uncertainty in recording cargo volumes where the recording process is still done manually by relying on documents from shipping agents so that if Inaportnet is not available, it makes it difficult to access documents digitally and need a long time. The results of this research show that if the Inaportnet system is modified and slightly combined with the Portbase system on certain systems, the operational system will likely increase its efficiency and the data in the Inaportnet system will be more reliable and trustworthy so as to in-crease cooperation and strengthen trust between incumbent.
ANALYSIS OF MAN-HOUR REQUIREMENTS AND SCHEDULING FOR FLOATING DOCK REPAIRS Ramadhani, Salsabila; Hardiyanti, Fitri; Suhardjito, Gaguk; Soelistijono, Rachmad Tri; Wahidin, Aang
Journal of Marine-Earth Science and Technology Vol. 4 No. 3 (2023): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v4i3.1064

Abstract

A floating dock (FD) is a platform for ship construction and repair. Structural damages to a FD can significantly reduce ship docking productivity, leading to substantial losses for shipyard companies. In order to restore its operational capabilities, repairing the damaged FD becomes essential. This research aims to plan and analyze the schedule to ensure the efficiency and effectiveness of FD repair activities. The process begins with the establishment of a Work Breakdown Structure (WBS), followed by determining the required man hours (MH) and scheduling using the Precedence Diagram Method (PDM). Finally, the S-curve is made for monitoring the progress of the FD repairment. The findings of this study, based on a case study involving a 6700 TLC FD, reveal a WBS comprising 66 repair tasks including two tasks for FD testing and finishing in addition to four areas of hull, walls, deck and tanks, piping systems, and machinery. The MH requirement for these tasks is 4048 MH. From the scheduling results, it was found that the duration was 12 days, with a total of 53 critical activities and 25 critical paths in the floating dock repair work using the precedence diagram method.
INVESTIGATING THE IMPACT OF INNOVATION TECHNOLOGIES IN LOGISTICS (CROSSING TRANSPORTATION MODEL: CASE STUDY OF THE LANGARA - KENDARI ROUTE) Siddiq, Muhammad Sya’ban Shibawaihi; Hardiyanti, Fitri; Buana, I Gusti Ngurah Sumanta
Journal of Marine-Earth Science and Technology Vol. 5 No. 1 (2024): 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.v5i1.1065

Abstract

Konawe Islands is a regency in the Southeast Sulawesi Province. This area heavily relies on Kendari City, the provincial capital, to support daily necessities, recreational activities, and higher education pursuits for the people of Konawe Islands. Wooden boats and ferries serve as the primary means of transportation for the locals. However, during harsh weather, only ferries is operational. Yet, there have been loading violations on ferries, increasing the risk to maritime safety. This research aims to formulate ways to address loading issues on ro-ro ferries along the Langara-Kendari route, ensuring compliance with laws and facilitating smooth cargo distribution. The distribution system is structured based on the method persona user and empathy mapping. Research findings indicate that distribution service users require a freight forwarder for large-scale cargo and consolidation for smaller-scale loads. Therefore, the author recommends the use of applications like Uber, Grab, and Uber to resolve this issue.
A CRITICAL REVIEW ON FATIGUE ASSESSMENT APPROACH IN SHIP STRUCTURAL DETAILS Ariesta, Rizky Chandra; Frestiqauli, Santi; Safa’at, Ahmat; Pradesar, Yusuf; Kallur, Abhishek
Journal of Marine-Earth Science and Technology Vol. 5 No. 1 (2024): 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.v5i1.1066

Abstract

Review of the methods used in the fatigue analysis of structures has been widely used. The resulting fatigue is primarily the result of repeated loads acting on the structure both internally and externally. Internal loads are caused by the cargo loading and unloading process, while external loads are caused by sea waves. The interaction of the two loads affects the strength of the structure. In this paper, we will discuss materials, residual stresses and environmental factors that cause fatigue in structures. The focus of analysis in this critical review is on the structural details of the ship. In determining fatigue in detailed structures, it can occur in welded joints, section cuts and shape imperfections.
APPLYING DESIGN ALTERNATIVE APPROACH TO OPTIMIZE COMFORT, SAFETY, AND COST-EFFECTIVENESS IN THE REDESIGN OF ACCOMMODATION ROOMS ON THE SHIP KM TAREX 2 Mustain, Achmad Difa Khoirul; Wahidin, Aang; Soelistijono, Rachmad Tri; Nugroho, Priyambodo Nur Ardi; Ashari, Azza Nuha Salma
Journal of Marine-Earth Science and Technology Vol. 5 No. 1 (2024): 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.v5i1.1067

Abstract

In late December 2021, the ship KM Tarex 2, owned by PT. Pelayaran Mandala Sejahtera Abadi, underwent its annual docking at PT. Tambangan Permai Raya. During this time, the ship was found to be in a state of disrepair, including its accommodation rooms. The ship's current condition, feedback from stakeholders, and financial considerations served as the catalyst for a comprehensive interior redesign, with a primary focus on enhancing comfort, safety, and economy. The interior redesign of the accommodation spaces on the ship KM Tarex 2 involved the exploration of two alternative design concepts. These concepts centered around the Owner's Room, Crew's Room, Messroom and Life Jacket Storage. Alternative Design 1 adopted a Contemporary Concept, while Alternative Design 2 embraced a Modern Minimalist concept. The selection process for these designs involved soliciting feedback from a panel of 18 individuals, consisting of 12 representatives from PT. Pelayaran Mandala Sejahtera Abadi, 3 individuals from PT. Tambangan Permai Raya, and 3 crew members of the ship KM Tarex 2. Ultimately, Alternative Design 1 garnered an average approval rating of 67% across all rooms, surpassing Alternative Design 2 in preference. The selected design alternatives were evaluated for compliance with regulatory standards, achieving a 100% compliance rate for each room and an average comfort rating of 40%. Additionally, the chosen materials, as determined through a Google Form questionnaire, included ALUMETAL brand ACP Materials for room lining and ceiling, along with Henan Fortovan brand LVT for ship deck covering. These materials received an average approval rating of 61%. Economically, the analysis of material costs demonstrated that the project could be undertaken without exceeding the ship's annual income, ensuring financial feasibility.
REDISCOVER PARADISE: ELEVATING BALI’S MARINE TOURISM THROUGH SUSTAINABLE SOLID WASTE MANAGEMENT (SSWM) Ardiyanto, Feri; Prakasa, Gilang; Achmadi, Tri
Journal of Marine-Earth Science and Technology Vol. 5 No. 1 (2024): 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.v5i1.1069

Abstract

As a global tourist destination, Bali’s marine ecosystem holds significant value for the leisure industry. However, along with the enormous growth of the industry, the island also faces an imminent waste crisis. As of 2022, 1,085,507 metric tonnes of waste are produced by the island, which 18% of it or 190,726 metric tonnes of waste left unmanaged. Coupled with monsoon and wet season weather that delivers trash ashore, effective waste management holds a pivotal role to preserve the marine ecosystem of the island and its tourism industry. By conducting a qualitative descriptive method, this research proposes sustainable solid waste management (SSWM) as an attempt to combat the waste crisis on the island. This research aims to depict the feasibility – cost, and benefit – of implementing the SSWM. The findings of this research conclude that the implementation of SSWM will benefit the marine ecosystem and further sustain tourism in Bali.
MANAGING THE SPREAD OF COVID-19 PANDEMIC IN INDONESIAN SEA TRANSPORTATION Utama, I K A P; Setyawan, D; Riyadi, S; Hetharia, W R; Thomas, G A; Ryan, C; Rosa, A G L; Huang, L
Journal of Marine-Earth Science and Technology Vol. 5 No. 1 (2024): 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.v5i1.1070

Abstract

COVID-19 has been pandemic since the early 2020 and many efforts have been carried out worldwide. Among others, managing the spread of pandemic has been focused on air transportation since the mobility of people has been more actively using aeroplane hence the possibility of infecting people is much higher. Despite less intense, efforts to minimise the blow-out of COVID-19 in sea transportation have also been conducted. The International Maritime Organization (IMO) released guidance such pretravel information to crews and customers The types of guidance include the following items, namely pre-departure, social distancing, the use of masks, personal hygiene, environmental hygiene, and training. In the case of Indonesia, similar direction is introduced and implemented to cargo and passenger vessels. The current paper discusses the Indonesian regulation of managing COVID-19, which is based on IMO/WHO guidance, together with its implementation in the daily activities of people in sea transportation. A survey questionnaire is made out to collect the relevant information. The discussion covers the implementation of such guidance to Indonesian cargo and passenger vessels difficulties in applying the regulation on those ships and the related solutions.
WELDING QUALITY CONTROL USING THE FAILURE MODES AND EFFECTS ANALYSIS (FMEA) METHOD AT PT. X Jalal, M.Raja Shafa Aulia Jalal; Yusim, Adi Kurniawan
Journal of Marine-Earth Science and Technology Vol. 5 No. 2 (2024): September
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i2.1807

Abstract

This research aims to identify and analyze defects in the welding process at PT. X uses the FMEA method. The primary defects found were cracks, porosity, spatter, and undercut. The leading causes of crack defects are poor material conditions, porosity caused by inadequate facilities, spatter due to inappropriate parameter settings, and undercut due to lack of supervision. The highest RPN value is crack, with a score of 288, followed by porosity (280), spatter (196), and undercut (175), indicating that crack and porosity require special attention. Improvement strategies include improving material quality and inspection procedures for cracks, improving facilities for porosity, operator training and automated monitoring for spatter, and increased monitoring for undercuts. Based on the visualization of the Pareto diagram, the number of defects that frequently occurred was spatter in 16 cases with a percentage of 36%, followed by undercut in 11 cases (25%), crack in 9 cases (21%), and porosity in 8 cases (18%). This data was collected from production that experienced defects from January – April 2024. The Pareto diagram shows that spatter is the most frequently occurring defect, even though it has a lower RPN than crack and porosity. Therefore, the repair priority must remain on crack and porosity because of their significant impact on weld quality. Implementing the proposed improvement strategy is expected to reduce the risk of failure and increase the efficiency and quality of the welding process at PT. X.
THE INFLUENCE OF SLOW STEAMING ON FUEL USAGE AND CARBON EMISSIONS OF CONTAINER SHIPS: A CASE STUDY OF THE SURABAYA-MAKASSAR ROUTE Meiliana, SW; Syahab, H; Wulandari, AI; Utama, IKAP
Journal of Marine-Earth Science and Technology Vol. 5 No. 3 (2024): December
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i3.1426

Abstract

The practice of slow steaming in maritime transport, initially introduced in the 1970s during the first oil crisis, has evolved into a strategy offering both cost reduction and environmental benefits. The overall combined costs for carriers and shippers experienced significant reductions with slow steaming, with extra slow steaming yielding even greater cost savings. While slow steaming is not the sole method to reduce fuel consumption and emissions, it proves to be the most efficient in terms of time and cost. Shipping operators globally recognize its advantages, as it aligns with environmental sustainability efforts by reducing greenhouse gas emissions. This study carried out a comprehensive exploration of the effects of slow steaming on container ships, focusing specifically on the Surabaya-Makassar route. The research aims to learn how much the impact of slow steaming on the ship operation. This study analyzes the impact of slow steaming on container ships in terms of fuel consumption and carbon emissions on the Surabaya-Makassar route. The lowest speed is 5 knots, and the highest speed is 11 knots. At a speed of 5 knots, fuel consumption decreases by 5% compared to the ship's speed at 11 knots. The same applies to the reduction in carbon emissions.
AERIAL PHOTOGRAPHY USING UNMANNED AERIAL VEHICLE (UAV) FOR TOPOGRAPHIC MAPPING AND DAM ANALYSIS (CASE STUDY: KARANGNONGKO DAM PACKAGE ONE) Prawitasari, Shafa Nabila; Nabilah, Ayu Raina
Journal of Marine-Earth Science and Technology Vol. 5 No. 2 (2024): September
Publisher : Marine & Earth Science and Technology Research Center, DRPM, ITS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.12962/j27745449.v5i2.2722

Abstract

Water is a natural resource that is crucial for survival and various industrial, fishery, and agricultural activities. In the use of water, there is often a lack of care in its use and utilization so that efforts are needed to maintain a balance between the availability and needs of water through development, conservation, improvement and protection. The construction of dams, such as the Karangnongko Dam, aims to improve community welfare by providing irrigation water and raw water, as well as potential as a tourist destination. Visualization of the Slope Map, Aspect Map, and Contour Map shows the progress of the Karangnongko Dam construction in August 2024. These maps indicate the dominance of flat areas, the direction of the excavation tends to the northwest, and the contours are tight at the edges and looser in the middle area of the dam.

Page 6 of 8 | Total Record : 76

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