Stability of Fishing Vessels with Water on Deck: A Review

1982 ◽  
Vol 26 (02) ◽  
pp. 106-116
Author(s):  
Richard L. Storch ◽  
Ibrahim Çaglayan
Keyword(s):  
Fishing Vessel ◽  
Sea State ◽  
Hydrodynamic Analysis ◽  
Analysis Techniques ◽  
Water On Deck ◽  
Hydrodynamic Approach ◽  
Fishing Vessels ◽  
Logical Point ◽  
Static Approach ◽  
Vessel Stability

A thorough literature survey of research into the effect of water on deck on fishing vessel stability revealed that four predominant analysis techniques have been employed. The first, a static approach, is used to judge vessel stability by predicting the pseudo-static angle of heel, the heel angle about which the vessel rolls when water is trapped on deck. The second approach is a dynamic one in which the equation of motion in roll is written and the water on deck is treated as a roll-inducing moment. The third approach employs probabilistic analysis to determine the likelihood of having water on deck, usually presented as a function of freeboard and sea state. A hydrodynamic analysis, applied in the research of Dillingham, models the geometry of the water on deck as a function of time and inputs the resulting forces and moments as an exciting term in the roll motion equation, assuming linear motions. The hydrodynamic approach represents a significant advancement in understanding the phenomenon and is a logical point from which to initiate further research efforts.

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.

Small Commercial Fishing Vessel Stability Analysis: Where Are We Now? Where Are We Going?

2003 ◽  
Vol 40 (04) ◽  
pp. 296-302
Author(s):  
John Womack
Keyword(s):  
Stability Analysis ◽  
Dynamic Environment ◽  
Commercial Fishing ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
The Many ◽  
Vessel Stability ◽  
Marine Vessels ◽  
Current Risk

Small commercial fishing vessels are the largest, most diverse, and constantly evolving class of marine vessels in existence. Yet the methods used to evaluate their stability reflect a one size fits all approach with little improvement over the many decades since their introduction in the early 1900s. This conflict coupled with significant flaws in the methods used to convey stability guidance to the crews leads to unacceptable risks being taken and fishing vessels and their crews being lost. Improvements are needed in all areas of small commercial fishing vessel analysis: better criteria that reflect the true dynamic environment faced by the crews, better means to convey stability guidance, including the current risk of capsize to the crews, and lastly a program to teach stability and how to use the guidance provided.

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.

An Approximate Method for Intact Stability of Fishing Vessels

1999 ◽  
Vol 36 (03) ◽  
pp. 171-174
Author(s):  
Hüseyin Yilmaz ◽  
Abdi Kükner
Keyword(s):  
Design Stage ◽  
Design Parameters ◽  
Preliminary Design ◽  
Ship Stability ◽  
Fishing Vessels ◽  
Initial Stability ◽  
Intact Stability ◽  
Preliminary Design Stage ◽  
Reduce Risk ◽  
Vessel Stability

It is well known that stability is the most important safety requirement for ships. One should have some information on ship stability at the preliminary design stage in order to reduce risk. Initial stability of ships is an important criterion and can be closely evaluated in terms of form parameters and vertical center of gravity. In this study, using some sample ship data, approximate formulations are derived by means of regression analysis for the calculations expressed in terms of ship preliminary design parameters that can easily provide approximate GM calculations. Thus designers can be provided with ship stability at the preliminary design stage, and also a set of appropriate design parameters for improving vessel stability can easily be determined.

scholarly journals PERBANDINGAN KAPAL MONOHULL, CATAMARAN, TRIMARAN BERDASARKAN TINJAUAN OPERASIONAL PENGGUNAAN BAHAN BAKAR

2021 ◽  
Vol 4 ◽  
pp. 30-36
Author(s):  
Jacobus Tupan ◽  
Richard Benny Luhulima
Keyword(s):  
Data Analysis ◽  
Energy Requirements ◽  
Energy Usage ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Initial Stage ◽  
Transverse Stability ◽  
Fishing Fleets

In general, fishing fleets operating in Maluku waters and managed by local entrepreneurs consist of monohull and trimaran fishing vessels with outriggers. Monohull fishing vessels have limited deck space and poor transverse stability, while trimaran-type vessels have better deck space and transverse stability than monohull vessels, but because they are still in the form of outriggers, the space is limited. This study aims to examine the development of the trimaran fishing vessel in terms of energy requirements, safety, and comfort of the crew during fishing operations. The initial stage of this research begins with data analysis and the basic size of monohull fishing vessels operating in Maluku waters, from this data the shape of the trimaran hull is designed. Calculation of resistance using CFD, then analyzed the calculation of resistance and stability, safety, and comfort of the ship using Maxsurf. The drag Trimaran is 8.86% smaller than a monohull and 3.25% smaller than a catamaran. Energy Usage (EHP) is proven by trimaran ships more than other ship modes. The average trimaran period is 10.5 seconds which meets IMO standards and is declared operationally good.

scholarly journals ANALISA TITIK KRITIS GERAKAN ROLL KAPAL TRIMARAN UNTUK DIAPLIKASI PADA KAPAL IKAN PURSE SEINE

2021 ◽  
Vol 4 ◽  
pp. 44-50
Author(s):  
Fella Gaspersz ◽  
Richard B. Luhulima
Keyword(s):  
Critical Point ◽  
Wave Height ◽  
Inclination Angle ◽  
Weather Conditions ◽  
Extreme Weather ◽  
Roll Motion ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Wave Heights ◽  
Wave Angle

The marine fisheries catching and processing industry are considered vulnerable to the effects of extreme weather at sea. Global warming effects and El Nino and La Nina have a significant impact on the upwelling process, which impacts the lifestyle and environment of marine biota, including pelagic fish, which is one of the most important contributors to the shipping industry. Extreme weather conditions, with wave heights ranging from 1 to 5 meters, dominate the waters of Maluku. In extreme sea conditions, most fishers choose not to go fishing, not because there are no fish at the fishing grounds, but to avoid mishaps at sea. This research aimed to analyze the critical point of ship roll motion and ship stability. The hull shape employed in this study was a monohull fishing vessel and a trimaran fishing vessel with the same displacement of 21,1 tons. In extreme weather conditions, the Maxsurf software was used to analyze the ship's response, especially the critical point of the ship's roll motion. The I.M.O. Standard was utilized to calculate the ship's stability. The operational speed of the ship was v = 3 knots, with fluctuations in wave angle of incidence between 00 - 1800. Wave heights of 1,0; 2,0; 3,0, and 0,4 meters represent extreme weather conditions in Maluku waters' fishing grounds. The findings revealed that the trimaran hull type had better stability where the inclination angle of trimaran vessel stability was 480 while the monohull was 410. The trimaran fishing vessel was able to withstand a wave height of 3 meters with an inclination angle of 32,560. In comparison, the monohull fishing vessel was able to survive at a wave height of 2 meters with an inclination angle of 24,690. Monohull fishing vessel had a maximum limit of roll motion at wave directions 82 and 99 with a wave height of 3 m, and it reached at the critical point at angles of 43 and 138, at the height of 4 m. Meanwhile, the trimaran fishing vessel had a critical point at a wave angle of 760 and 1000 with a wave height of 4 meters. In the area between those two angles, monohull and trimaran fishing vessels will lose the balance (stability) of the roll motion, resulting in capsize.

scholarly journals Level of Compliance of Traditional Fishing Vessels to Fisheries Department Regulations in Pangkor Island

2019 ◽  
Vol 9 (2) ◽  
pp. 4585-4589
Keyword(s):  
Content Analysis ◽  
Qualitative Content Analysis ◽  
Likert Scale ◽  
Fishing Vessel ◽  
Statistical Tools ◽  
Fishing Vessels ◽  
Traditional Fishing ◽  
Frequent Reason

This study aims to determine the level of compliance of fishing vessels operations to Malaysian Fisheries Department rules and regulations as well as to identify the reasons of non-compliance among fishermen in Pangkor Island, Perak. The data was collected through the distribution of questionnaire and analysed using descriptive statistical tools. The level of compliance of fishing vessel operations was determined by a five point Likert scale, whilst qualitative statements were grouped into several topics using qualitative content analysis. The reasons for the fishermen’s non-compliance were also identified by using closed-ended and open-ended questions. The outcome of this study can be categorised into several levels of compliance. As for the reasons for non-compliance, the most frequent reason chosen by respondents was lack of trust towards the authorities.

scholarly journals FISHING-VESSEL DETECTION USING SYNTHETIC APERTURE RADAR (SAR) SENTINEL-1 (CASE STUDY: JAVA SEA)

2020 ◽  
Vol 16 (2) ◽  
pp. 131
Author(s):  
Sarah Putri Fitriani ◽  
Jonson Lumban Gaol ◽  
Dony Kushardono
Keyword(s):  
Synthetic Aperture Radar ◽  
Object Identification ◽  
Synthetic Aperture ◽  
Overlay Analysis ◽  
Constant False Alarm Rate ◽  
Fishing Vessel ◽  
Fishing Vessels ◽  
Sensing Technology ◽  
Vessel Detection ◽  
Aperture Radar

The synthetic aperture radar (SAR) instrument of Sentinel-1 is a remote sensing technology being developed to enable the detection of vessel distribution. The purpose of this research is to study fishing-vessel detection using SAR Sentinel-1 data. In this study, the constant false alarm rate method (CFAR) for Sentinel-1 data is used for the detection of fishing vessels in Indramayu sea waters. The data used to detect ships includes SAR Sentinel-1A images and vessel monitoring system (VMS) data acquired on 8 March and 20 March 2018. SAR Sentinel-1 imagery data is obtained through pre-processing and object identification using Sentinel Application Platform (SNAP) software. Overlay analysis is then used to enable discrimination of immovable and movable objects and validation of ships detected from SAR Sentinel-1 imagery is performed using VMS data. From overlay analysis, 46 ships were detected on 8 March 2018 and 39 ships on 20 March 2018. Of all the ship points detected using SAR Sentinel-1, 7.06% could be detected by VMS data while 92.94% could not. The number of ships detected by SAR Sentinel-1 is greater than those detected by VMS because not all ships use VMS devices. 

A Seakeeping Study of the UBC Series

1997 ◽  
Vol 34 (01) ◽  
pp. 10-23
Author(s):  
Sander M. Calisal ◽  
David Howard ◽  
Jon Mikkelsen
Keyword(s):  
British Columbia ◽  
Measurement Procedure ◽  
Collection System ◽  
Fishing Vessel ◽  
The West ◽  
Hull Form ◽  
University Of British Columbia ◽  
Fishing Vessels ◽  
Seakeeping Performance ◽  
The University

The University of British Columbia (UBC) and the British Columbia Research Incorporated (BCRI) collaborated to design a fishing vessel suitable for use on the west coast of Canada. This vessel, called the UBC Series parent hull form, was designed to have a large aft deck area and a volumetric coefficient comparable to those of modern Canadian fishing vessels. The resistance characteristics of this hull were improved without compromising on functionality and usable space. A resistance algorithm developed from the results for a systematic series of low-L/B displacement-type vessels, the UBC Series, was previously published (Calisal&McGreer, 1993). However, during the design process, the seakeeping performance of the vessel was never addressed. This paper describes the seakeeping performance of the UBC series in head seas. An algorithm, developed from the results of the model tests, can be used to calculate the seakeeping response of similar low L/B vessels. To calibrate the seakeeping measurement procedure, tank instrumentation, and data collection system, the ITTC Standard Seakeeping hull form (the S-175 hull form) was tested and the results were compared against published results for this hull form. The same techniques used for the standard hull form were then used to measure the seakeeping performance of the UBC Series. Possible application of the algorithm for non-UBC Series forms is also discussed.

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