scholarly journals Analysis of Stability, Resistance, and Seakeeping Accord to Dimension and Form of Fishing Vessel 10, 20, 30 GT

INSIST ◽  
2019 ◽  
Vol 4 (1) ◽  
pp. 199
Author(s):  
Rizky Irvana ◽  
Arif Fadillah ◽  
Shanty Manullang ◽  
Fridolini Fridolini
Keyword(s):  
Resistance Ratio ◽  
International Maritime Organization ◽  
Stability Criteria ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Analysis Of Stability ◽  
The Stability ◽  
Vessel Motion ◽  
Better Than

Fishing vessels used to catch resources from the sea has to pass some of the regulations from International Maritime Organization for sea-worthiness of the vessel especially about stability, resistance to acquire the highest velocity, and the vessel’s motion. This research discusses the effect of the vessel’s dimension and the hull shape by using the stability standard from IMO.The result shows that the ratio of the B/T which meets the stability criteria is 2.50 with the ratio of KG/H of the vessel is 0.65, with the assumption that the KG and H of the vessel are more than 0.70. Whereas if the resistance ratio B/T is big, the resistance for the vessel will be relatively smaller. In terms of the vessel motion, a vessel with a V-type hull will better than a U-type hull in seakeeping.

scholarly journals Risk Assessment Fishing Vessel Based for the Intact Ship Stability

2021 ◽  
Vol 934 (1) ◽  
pp. 012062
Author(s):  
B Santoso ◽  
R Romadoni ◽  
S Suzdayan ◽  
P Nasution
Keyword(s):  
Risk Assessment ◽  
Safety Assessment ◽  
International Maritime Organization ◽  
Stability Criteria ◽  
Load Case ◽  
Fishing Vessel ◽  
Ship Stability ◽  
Stability Curve ◽  
Ship Model ◽  
The Stability

Abstract Application of safety assessment and risk analysis using a risk-based approach for ship stability in ship operations at sea. However, there are currently no specific criteria and computational methods for risk assessment of ship stability. Based on the stability requirements for fishing activities at sea, the ship stability criteria will be explained in detail in this study. Calculation of stability used to obtain the GZ enforcement arm is carried out with the help of software for the shaking period using the International Maritime Organization (IMO) formula. Next, how to calculate parameters and determine certain coefficients for risk assessment of ship stability, and how to redraw the stability curve. Finally, proposed method is applied to ship model with comments and recommendations for monitoring to provide and overview. The study result indicate that the five loading conditions that occur on the ship have good stability by the criteria set by the International Maritime Organization (IMO). The value of GMt in each condition includes condition 1 and so on, 0.48; 0.48; 0.47; 0.46; 0.43. The results are presented in the form of F-N. Finally the sensitivity of the model is evaluated along with the assessment of associated uncertainties. The FN graph represents acceptable areas and unacceptable areas. Based on the results of data processing, the highest GM at GM Load-case 5 0.638 meters is in the Acceptable area. While Load-case 1 to Load-case 4 GM values sequentially Load-case 1: 0.487 meters; Load-case 2: 0.488 meters; Load-case 3: 0.47 meters; Load-case 4: 0.468 meters; is in an unacceptable area Unacceptable.

scholarly journals Prediction of Maneuverability in Shallow Water of Fishing Trawler by Using Empirical Formula

2021 ◽  
Vol 9 (12) ◽  
pp. 1392
Author(s):  
Su-Hyung Kim ◽  
Chun-Ki Lee ◽  
Yang-Bum Chae
Keyword(s):  
Shallow Water ◽  
Empirical Formula ◽  
High Speed ◽  
International Maritime Organization ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Marine Accidents

The length between perpendiculars (LBP) of most fishing vessels is less than 100 m. Thus, they are not subject to the International Maritime Organization (IMO) maneuverability standards, affecting research on maneuverability. However, upon referencing the statistics of marine accidents related to vessel maneuvering, the number of marine accidents caused by fishing vessels is 3 to 5 times higher than that of merchant ships. Therefore, systematic and consistent research on the maneuverability characteristics of fishing vessels is surely required. In particular, a fishing vessel frequently enters and departs from the same port and often sails at high speed due to familiarity with the characteristics of the situation, which may cause maneuvering-related accidents. In this study, the maneuverability of a fishing vessel in shallow water was predicted using an empirical formula. The results of this study are expected to not only be of great help in conducting simulations when analyzing marine accidents involving fishing vessels, but will also provide unique parameters of fishing vessels that lead to developing autonomous vessels.

A Systematic Study of Wave Phasing on Righting Arm Curves for Fishing Vessels

2005 ◽  
Author(s):  
John Womack ◽  
Bruce Johnson
Keyword(s):  
Software Package ◽  
Cost Effective ◽  
Future Research ◽  
Stability Criteria ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Software Packages ◽  
Wave Effects ◽  
Vessel Stability ◽  
Naval Architect

This paper summarizes the results from the SNAME funded T&R grant titled Preliminary Development of the Next Generation of Stability Criteria for Small Fishing Boats. The principal goal of this project was to take a broad look at effects of head and following waves on the current still water based stability evaluation methods to focus the needs for future research in the development of new performance based stability criteria. The wave effects were calculated using an off the shelf naval architect software package of the type typically used in small fishing vessel stability evaluations to explore the ability of these software packages to perform cost effective meaningful stability research. The use of the off the shelf naval architect software package also allowed the authors to explore new performance based stability criteria formats that utilized software and basic concepts already available to the naval architect.

scholarly journals Mathematical model for determining the roll angle of a fishing vessel when purse seine sampling

2021 ◽  
pp. 153-157
Author(s):  
Н.Л. Великанов ◽  
О.В. Шарков
Keyword(s):  
Traction Force ◽  
Sufficient Accuracy ◽  
Roll Angle ◽  
Fishing Gear ◽  
Fishing Vessel ◽  
Calculation Algorithm ◽  
Fishing Vessels ◽  
Trawl Fishing ◽  
The World ◽  
The Stability

Лов рыбы с применением кошельковых неводов является наиболее распространенным в мире после тралового лова. Процессы кошелькования невода, выборки улова могут существенно влиять на остойчивость рыболовного судна (сейнера). В данной работе рассматривается влияние на угол крена силы, действующие со стороны орудия лова. Приведен алгоритм расчета, учитывающий координаты точки приложения силы натяжения троса, идущего к орудию лова, углы наклона троса, величину силы. Составлены расчетные зависимости для процессов крена, получены выражения для угла наклона корпуса судна. Приведены примеры расчетов. В частности, рассмотрено изменение угла крена от тягового усилия, высоты подъема канифас-блока для промыслового судна. Проведенные расчеты свидетельствуют о достаточной для инженерных расчетов точности и возможности использовать приведенный алгоритм при оценочных расчетах на различных стадиях проектирования. Важно учитывать возможность одновременного наложения ветровых нагрузок, действия волн на корпус судна. В этих случаях крен и дифферент будут возрастать. Поэтому спецификой промысловых судов является необходимость учета поведения судна при проведении промысловых операций. Fishing with the use of purse seines is the most common in the world after trawl fishing. The processes of pursing and seine sampling can significantly affect the stability of a fishing vessel (seiner). In this paper, the influence of forces acting from the fishing gear on the roll angle is considered. The calculation algorithm is given, taking into account the coordinates of the point of application of the tension force of the cable going to the fishing gear, the angles of inclination of the cable, the magnitude of the force. Calculated dependences for roll processes are compiled, expressions for the angle of inclination of the vessel's hull are obtained. Examples of calculations are given. In particular, the change in the roll angle from the traction force, the lifting height of the snatch–block for a fishing vessel is considered. The calculations carried out indicate sufficient accuracy for engineering calculations and the possibility of using the above algorithm for evaluation calculations at various stages of design. It is important to take into account the possibility of simultaneous imposition of wind loads, the action of waves on the hull of the vessel. In these cases, the roll and trim will increase. Therefore, the specifics of fishing vessels is the need to take into account the behavior of the vessel during fishing operations.

scholarly journals STABILITY ANALYSIS OF FOUR TYPES OF POLE AND LINER

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
St. Aisyah Farhum
Keyword(s):  
Stability Analysis ◽  
International Maritime Organization ◽  
Minimum Standard ◽  
Flat Bottom ◽  
Fishing Boat ◽  
Standard Value ◽  
Standard Values ◽  
The Stability ◽  
Stability Results ◽  
Better Than

<p>This study was purposed to compare the stability of four types of pole and liner casco (round bottom, round flat bottom, round sharp bottom and u-v bottom),. The stability value was analyzed by calculating the stability on the curve with the heeling angle of 0-90°. The stability results of each casco type were then compared with the criteria of minimum standard value derived from IMO (International Maritime Organization). Results showed that the four casco types had greater stability values than IMO standard values. This study found that the stability value of the round –sharp bottom casco was better than the others.</p><p>Keywords: Stability of fishing boat, Pole and liner, casco</p>

scholarly journals STABILITY ANALYSIS OF FOUR TYPES OF POLE AND LINER

2010 ◽  
Vol 2 (2) ◽  
Author(s):  
St. Aisyah Farhum
Keyword(s):  
Stability Analysis ◽  
International Maritime Organization ◽  
Minimum Standard ◽  
Flat Bottom ◽  
Fishing Boat ◽  
Standard Value ◽  
Standard Values ◽  
The Stability ◽  
Stability Results ◽  
Better Than

This study was purposed to compare the stability of four types of pole and liner casco (round bottom, round flat bottom, round sharp bottom and u-v bottom),. The stability value was analyzed by calculating the stability on the curve with the heeling angle of 0-90°. The stability results of each casco type were then compared with the criteria of minimum standard value derived from IMO (International Maritime Organization). Results showed that the four casco types had greater stability values than IMO standard values. This study found that the stability value of the round –sharp bottom casco was better than the others.Keywords: Stability of fishing boat, Pole and liner, casco

scholarly journals Stability Study of Flat Hull Ship for Fishing Tourism

Teknomekanik ◽  
2020 ◽  
Vol 3 (2) ◽  
pp. 80-85
Author(s):  
Rahmat Azis Nabawi ◽  
Syahril Syahril ◽  
Salmat Salmat
Keyword(s):  
Flat Plate ◽  
Simulation Method ◽  
Stability Study ◽  
International Maritime Organization ◽  
Design Criteria ◽  
Stability Criteria ◽  
Load Case ◽  
Ship Stability ◽  
Minimum Standards ◽  
The Stability

The availability of boats is needed to develop fishing tourism. Most of the boats used so far generally use fishing boats made of woodcut in the forest, so this can damage the environment and cause natural disasters. Ships using a flat plate hull made of steel can be a substitute for wooden ships. This study aims to test the stability of a flat plate vessel designed for fishing boats. The ship stability test was carried out using a computer simulation method using Maxsurf Stability software. The ship stability criteria refer to the International Maritime Organization code A.749 (18), Ch 3-design criteria applicable to all ships. The ship stability analysis was carried out on two variations of the load case. The value of GZ at A h 300, A h 400 and A h 300 - A h 400 for load case 1 and 2 are greater than the minimum standards determined by IMO. The maximum GZ value at load case 1 occurs at an angle of 400 and at load case 2 at an angle of 60.90. The GM value in load case 1 is 0.609 meters and in load case 2 is 0.485 meters. Based on the results of the tests that have been carried out, it can be denied that the flatboat design model for fishing tourism meets the criteria set by the International Maritime Organization.

scholarly journals STABILITAS, HAMBATAN DAN OLAH GERAK KAPAL IKAN MULTI PURPOSE NET/LINE HAULER 20 GT BERDASARKAN KAJIAN UKURAN DAN BENTUK KASKO KAPAL

2019 ◽  
Vol 10 (2) ◽  
pp. 117-128
Author(s):  
Arif Fadillah ◽  
Shanty Manullang ◽  
Rizky Irvana
Keyword(s):  
Stability Criterion ◽  
Center Of Gravity ◽  
Fishing Vessel ◽  
Hull Form ◽  
Aquatic Resources ◽  
Fishing Boat ◽  
The Stability ◽  
Minimum Resistance ◽  
Better Than ◽  
Means Of Production

Fishing boats are used in capturing or collecting aquatic resources. As a means of production, the boat should meet various conditions of seaworthiness i.e. good stability, good seakeeping ability and minimum resistance. Those criteria can be identified when the boat size and the hull form are designed. This study investigates the effect of the boat dimension and the hull form on the stability, resistance and seekeeping ability. Various sizes and hull shapes of a 20 GT fishing boat were simulated, and their performances were compared to the IMO standard. The results suggest that the minimum breadth (B) - draft (d) ratio which meets the stability criterion is 2.50, while the ratio of the center of gravity distance from the keel (KG) and the depth (D) of the boat is 0.65. Furthermore, for the boat with a higher B and D ratio, its resistance is relatively smaller. In terms of seakeeping ability, particularly roll and pitch motions, U type bottom performed better than the Akatsuki bottom. Keywords: fishing vessel, sea keeping, ship hull, stability, resistance  

scholarly journals Fisheries: A Missing Link in Greenhouse Gas Emission Policies in South Korea

2021 ◽  
Vol 13 (11) ◽  
pp. 5858
Author(s):  
Kyumin Kim ◽  
Do-Hoon Kim ◽  
Yeonghye Kim
Keyword(s):  
Greenhouse Gas ◽  
Greenhouse Gas Emission ◽  
Ghg Emissions ◽  
Bioeconomic Model ◽  
Negative Externalities ◽  
Fishing Vessel ◽  
Gas Emission ◽  
Fishing Vessels ◽  
The Government ◽  
Different Levels

Recent studies demonstrate that fisheries are massive contributors to global greenhouse gas (GHG) emissions. The average Korean fishing vessel is old, fuel-inefficient, and creates a large volume of emissions. Yet, there is little research on how to address the GHG emissions in Korean fisheries. This study estimated the change in GHG emissions and emission costs at different levels of fishing operations using a steady-state bioeconomic model based on the case of the Anchovy Tow Net Fishery (ATNF) and the Large Purse Seine Fishery (LPSF). We conclude that reducing the fishing efforts of the ATNF and LPSF by 37% and 8% respectively would not only eliminate negative externalities on the anchovy and mackerel stock respectively, but also mitigate emissions and emission costs in the fishing industry. To limit emissions, we propose that the Korean government reduce fishing efforts through a vessel-buyback program and set an annual catch limit. Alternatively, the government should provide loans for modernizing old fishing vessels or a subsidy for installing emission abatement equipment to reduce the excessive emissions from Korean fisheries.

scholarly journals Dispersion of Carbon Nanotubes with “Green” Detergents

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2908
Author(s):  
Kazuo Umemura ◽  
Ryo Hamano ◽  
Hiroaki Komatsu ◽  
Takashi Ikuno ◽  
Eko Siswoyo
Keyword(s):  
Carbon Nanotubes ◽  
Sodium Dodecyl ◽  
Detergent Solution ◽  
Absorbance Spectroscopy ◽  
Fundamental Research ◽  
The Stability ◽  
Single Walled Cnts ◽  
Better Than ◽  
Walled Cnts ◽  
Cnt Suspensions

Solubilization of carbon nanotubes (CNTs) is a fundamental technique for the use of CNTs and their conjugates as nanodevices and nanobiodevices. In this work, we demonstrate the preparation of CNT suspensions with “green” detergents made from coconuts and bamboo as fundamental research in CNT nanotechnology. Single-walled CNTs (SWNTs) with a few carboxylic acid groups (3–5%) and pristine multi-walled CNTs (MWNTs) were mixed in each detergent solution and sonicated with a bath-type sonicator. The prepared suspensions were characterized using absorbance spectroscopy, scanning electron microscopy, and Raman spectroscopy. Among the eight combinations of CNTs and detergents (two types of CNTs and four detergents, including sodium dodecyl sulfate (SDS) as the standard), SWNTs/MWNTs were well dispersed in all combinations except the combination of the MWNTs and the bamboo detergent. The stability of the suspensions prepared with coconut detergents was better than that prepared with SDS. Because the efficiency of the bamboo detergents against the MWNTs differed significantly from that against the SWNTs, the natural detergent might be useful for separating CNTs. Our results revealed that the use of the “green” detergents had the advantage of dispersing CNTs as well as SDS.

Sign in / Sign up

Export Citation Format

Share Document