Zona Laut Jurnal Inovasi Sains Dan Teknologi Kelautan

The Impact of Rainfall and Wind Speed on The Outcome of Catching Swanggi Fish Using Cantrang Catch Tools in Brondong National Fishing Port (PPN)

2024-07-23T13:06:00+00:00

Indonesia has a wealth of natural resources, especially in the fishing sector. The waters of Lamongan are one of the areas that has the potential of swanggi fishing that dominates the fishing sector by catching cantrang fish. The research is aimed at providing information to the Brondong National Fishing Port (PPN) and fishermen around the area about the impact of rainfall and wind speed on the catch of swanggi fish. The results of linear regression method analysis using T test, F test and determination test. The result of lineary regression test T test showed that the regression value of the rainfall variable to catch of fish is the value of sig.<0,05 while the variable of wind speed to Catch of Fish is the number of sig.>0,05. The determination test result of R2 is 0.445, which means that the variable rainfall and wind speed influenced 44.5% on the catch of the swanggi fish and the rest was affected by other factors.

Strength Analysis of Windlass Foundation on Hospital Auxiliary Ship by Using Finite Element Method

2024-07-23T12:55:30+00:00

Indonesia is a country whose territory consists mostly of waters and islands, to support the health sector, especially for remote and inland areas and disaster emergency response activities, a means of transportation is needed that can cover and serve the area, one of which is the Hospital Auxiliary Ship (BRS). This ship is equipped with hospital facilities and infrastructure equivalent to a Type C Hospital. In its operation, the ship cannot be separated from mooring activities, therefore, the existence of a windlass as a supporting facility for lowering anchor activities is important. The windlass foundation must have optimal strength and efficiency by taking into account the reference or class as the standard used. With these considerations, this research was conducted to determine the optimality of the windlass foundation used by the Hospital Auxiliary Ship, by analyzing the maximum stress value, maximum deflection, and safety factor using the Finite Element Method. The analysis is carried out by providing load variations, namely ship loads and environmental loads. The simulation results will be compared with the calculation results based on Lloyd's Register Rules and Regulation and Biro Klasifikasi Indonesia (BKI) regulations. Reviewing the simulation results due to ship loads and environmental loads when the windlass angle is 0o, the maximum stress is 25.56 MPa, the maximum deflection is 0.01366 mm, and the safety factor is 7.81. Meanwhile, when the windlass angle is 25o, the maximum stress is 23.29 MPa, the maximum deflection is 0.01346 mm, and the safety factor is 8.58. Based on the results of calculations and analysis, it is concluded that several criteria with several angular positions formed by the windlass before and during operation still meet the criteria set by Lloyd's Register Rules and Regulation and Biro Klasifikasi Indonesia.

Experimental Study of the Relationship between Slope and Opening Height of OWC Type Wave Breaker Model on Wave Reflection

2024-07-29T02:37:04+00:00

Breakwater is a very effective wave dampening building to be used as a coastal protection against coastal abrasion by destroying wave energy before it reaches the coast. The working mechanism of the OWC type is the rise and fall of ocean waves which will push the air in the OWC column, then will rotate the turbine connected to the generator to produce electricity.

This study aims to determine the effect of slope and opening height on breakwater on wave reflection. Then analyze the parameters that affect the amount of wave reflection and compare the resulting wave parameters.

This research was conducted at the Hydraulics Laboratory, Department of Civil Engineering, Faculty of Engineering, Hasanuddin University. The method used was experimental based. The resulting wave characteristics consist of three depth variations, three period variations and three stroke variations. The research model used is an Oscillating Water Column (OWC) type breakwater with slope variations of 45°, 60° and 90° and open wall variations as high as 5 cm, 10 cm and 15 cm. The reading of the water level fluctuation is done electronically through the reading of the wave monitor.

The results showed that the magnitude of the reflection coefficient is influenced by structural parameters, namely the slope and height of the model opening and hydraulic parameters, namely depth, period and wave height. The effect of the model slope on the reflection coefficient is that the greater the slope, the greater the reflection coefficient value. The effect of the model opening height is that the greater the opening height, the smaller the reflection coefficient value.

Mechanical Design and Construction of a Sea Water Wave Power Plant Using a Buoy System

2024-07-23T13:51:40+00:00

The need for electrical energy by society and industry has encouraged research to build electricity generation from new and renewable energy. The sea is a source of renewable energy, especially ocean wave energy. Mechanics for the design and construction of a floating system ocean wave power plant is a power plant that utilizes ocean wave energy with a two-floating system equipped with various components aimed at producing electric power. The aim of this research is to design and manufacture the mechanics of a sea wave power plant. The techniques used in making mechanical components are welding, cutting, smoothing, drilling and dynamo installation. The results obtained from this research are to design and build a mechanical system to produce ocean wave electricity. As a result of equipment testing in the mechanical systems lab, this wave power generator succeeded in lighting electric lights with an electric current output of around (0.01 – 0.02) Ampere and a voltage of (2.70 – 4.90) Volts with a float height of between (30 – 100) cm.

Motion Sickness Incidence (Msi) Study on Patrol Vessels (Kal-28) Catamaran

2024-07-27T13:16:11+00:00

On a Ship seasickness (motion sickness) is a condition caused by the movement of a ship that results in dizziness, nausea, and vomiting. The Motion Sickness Incidence (MSI) Study on the Patrol Catamaran (KAL-28) aims to evaluate the comfort level of passengers and the safety of the ship's crew during operations, following the ISO 2631/1997 standards. The evaluation is conducted on the vertical acceleration response of the ship under various wave conditions, speeds, and wave directions. Mapping is performed in various areas of the ship, including the deck, navigation room, and engine room, considering wave heights of 0.875 meters and 2 meters at speeds of 15 knots, 22.5 knots, and 30 knots. The research results indicate that at a speed of 15 knots, the deck area, navigation room, and engine room meet the criteria from comfortable to somewhat uncomfortable. However, at speeds of 22.5 knots and 30 knots, these areas are rated as somewhat uncomfortable to very uncomfortable. This study emphasizes the need for ship design that considers both passenger comfort and safety, especially for patrol catamarans.

Behavior Analysis Conductor Leg From Monopod Platform Effects of Lateral and Axial Loading Using the Finite Element Method

2024-07-26T05:29:13+00:00

A minimalist platform is a platform with a smaller and simpler deck and has less equipment. Minimalist platforms are generally designed for fields with lower reservoir reserves and are expected to have low costs in terms of fabrication and installation. One of the studies in developing a minimalist platform is about a conductor pipe that functions as a well and as the leg of the platform. This platform is susceptible to deflection under lateral and axial loads. In this research, an analysis will be carried out on the conductor pipe as a single pile which is subjected to a combination of lateral and axial loads to determine the stress and deflection that occurs in the conductor leg. This study was conducted using the finite element method with ABAQUS software. Inclination variations were carried out to determine the strength of the conductor leg when an inclination occurs. The result of this study was found that the conductor leg with an inclination of up to 1.5 degrees still had a stress below 0.6 yield. The result of this analysis shows that the conductor leg’s stress increases with increasing inclination. The maximum stress occurs at 1.5^o of inclination which is 82.45 MPa under operating conditions and 125.45 MPa under extreme conditions. This stress is still below the allowable stress of 213 MPa (0.6 yields).

Analysis of the Thickness and Stability of Subsea Pipes in the Masela Block Working Area on Yamdena Island

2024-07-23T13:00:39+00:00

Submarine pipeline is a transportation or concept used to transport hydrocarbon products such as crude oil and high-pressure natural gas. The fluid material or gas is pumped from the platform across the seabed using a pipeline. The Abadi Field in the Masela Block is one of the National Strategic Projects (PSN) located in the Tanimbar Islands Regency, Maluku Province. The block was developed by INPEX Masela Ltd. It geographically borders to Timor Leste and Australia. It was discovered in 2000 and contains potential gas reserves which reaching 10.73 trillion cubic feet (Tcf). This research aims to determine the minimum thickness of submarine pipelines, determine on-bottom stability in accordance with DNV RP-F109, and visualize the maximum pressure caused by significant current flow on the pipe surface by using Ansys Computational Fluid Dynamics 2023 R2 Student Version. This research method is used a quantitative. The analysis result of this research that have been obtained, the thickness of the pipe is 11.2 mm. The calculated of on-bottom stability is 0.012 for vertical and 0.008 for lateral stability. In Additionally, by using Ansys Computational Fluid Dynamics 2023 R2 Student Version, maximum pressure of the pipe is 14 Pa.

Analysis Of Preventive Measures On Sailing Safety In Indonesia

2024-07-03T13:52:03+00:00

Based on data from the National Transportation Safety Committee (KNKT), 178 accident cases have been investigated from 2018-2023. Of the 178 cases, 102 cases were classified as very serious cruise ship accidents (very serious marine accidents) and 76 cases were classified as incidents. This research aims to analyze preventive measures for shipping safety in Indonesia. This research is a type of qualitative research with qualitative descriptive analysis methods and literature reviews.

Literature Review: The Concept of Smart Port in Indonesia by Bibliometric Analysis Method

2024-03-13T05:04:55+00:00

Smart Port is a trending solution to meet the challenges of the maritime industry. "Smart" ports mean more attractive and competitive for customers. Artificial intelligence such as the Internet of Things, Big Data, and other technologies allow ports to create smarter workflows, conditions, or customer management, helping to make better decisions so that they can operate more effectively. This research applies bibliometric analysis. Bibliometric analysis is a literature review method that is widely applied in the field of business review to reveal the development of a field of research. This study reviewed 87 studies related to Smart Port research in Indonesia published between 2013 and 2023. Based on this research, the Smart Port Concept developed in Indonesia in terms of technology use includes automated operations using technology systems to control equipment, thereby minimizing human error, by digitizing gateways and using the Internet of Things (IoT). In the environmental concept, an environmental management system is needed to preserve the environment by adapting the concepts of sustainability and green port. This study contributes to a better understanding of the smart Port concept, which lacks an exact definition. Furthermore, this study provides an overview of publication trends and distribution, influential publishers, as well as the Smart Port concepts that are widely adopted in Indonesia. Regarding industry contributions, the results of this study will help port stakeholders clearly understand the issues related to smart port development to make critical decisions in applying advanced technologies to enhance smart port development and high efficiency in port operations.

Analysis of Passenger Evacuation Time During Fire on KL. Sultan Hasanuddin

2024-07-23T13:11:15+00:00

The aim of this study is to determine the time required in the evacuation of the passengers KL. Sultan Hasanuddin when it experienced a fire based on IMO regulations. Data from the National Transportation Safety Committee (KNKT) shows that 221 shipping accidents were investigated during 2007-2023. The majority of accidents are classified as ships on fire (33 percent) with one of the biggest handling focuses on passenger ships and most of the accidents resulted in fatalities, so it is necessary to provide input and information regarding the evacuation of passengers and cadets regarding the process and time of evacuation when the ship experiences a fire. The type of research is quantitative research using pathfinder software simulation whose evacuation route is based on safety plan data fo KL. Sultan Hasanuddin. From the simulation results and analysis obtained the time required in evacuating passengers KL. Sultan Hasanuddin when experiencing a fire based on the provisions of IMO MSC.1/Circ.1238 in night conditions is 25.44 minutes and in daytime conditions 24, 43 minutes, which is faster during the day due to the distribution of passengers on the deck which reduces the density on the evacuation route. The alternative evacuation route on the main deck is 24% faster than the evacuation route planned in the Safety Plan, thus providing an opportunity for passengers to evacuate faster and avoid fire smoke.