A study on the characteristics of manoeuvrability of fishing vessel

2021

JMSE

Self Cite

Most fishing vessels are less than 100 m in length between the perpendiculars, for which adherence to the International Maritime Organization maneuverability standards are not mandatory. In the design stage of fishing vessels, maneuverability is estimated using empirical formulas—mainly analytical methods—rather than costly and time-consuming model tests. However, the empirical formula is developed through the process of regression analysis on the model test results from merchant ships’ hull form and applying the same to the fishing vessels’ hull form may result in an estimation error due to the differences in the vessels’ characteristics—e.g., L/B, B/d and Cb·B/L—. In a previous study, the authors of this paper derived a modified empirical formula by adding the hull form parameters of trawl fishing vessels to the existing empirical formula based on those of merchant ships. This study analyzes the validity of the modified empirical formula in depth by applying it to a newly-built training vessel that has the hull form of a trawl fishing vessel. As a result of the study, the estimation results were improved by including the parameters of the hull form of trawl fishing vessels in the empirical formula developed for merchant ships.

Section: Forces and Moments From The Ruddermentioning

confidence: 99%

Section: Kijima Et Al (1990) Empirical Formulamentioning

confidence: 99%

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Estimation of Maneuverability of Trawl Fishing Vessel Using an Analytical Method

2021

JMSE

Self Cite

“…To overcome such a situation, estimation is required at the design stage along with maneuvering motion simulating models which consider maneuvering characteristics. Therefore, the authors used the Kijima 90 empirical formula [15], which is well known to researchers, in previous studies, to estimate the maneuverability of fishing vessels, and analyzed the error generated quantitatively and qualitatively [16][17][18]. In addition, in order to reduce the errors occurring in the estimation process, the modified empirical formula was derived by including the hull-form parameters of five stern trawlers in the process of deriving the Kijima 90 empirical formula [15].…”

Section: Introductionmentioning

confidence: 99%

Estimation of Maneuverability of Fishing Vessel Considering Hull-Form Characteristics

2021

JMSE

Self Cite

Fishing vessels with a length (LBP) of less than 100 m are generally not required to comply with the mandatory IMO Ship Maneuverability Standards. Therefore, an analytical method using empirical formula is preferred rather than a model test, which consumes a lot of time and monetary resources in estimating the maneuverability at the design stage. However, most empirical formulas have been derived from the model test results of merchant ships, and in the process, estimation errors may occur when hull-form parameters (L/B or CbB/L) with high correlation are applied to fishing vessel hull form whose characteristics are different from those of merchant ships. Therefore, a modified empirical formula was derived from previous research by including major parameters of fishing vessel hull form in the Kijima 90 empirical formula. In this study, maneuverability of stern trawler hull form is estimated for validating a modified empirical formula. The study confirmed that including characteristic parameters of the fishing vessel hull form in the empirical formula developed for merchant ships could improve the accuracy of estimation.

“…On the other hand, most fishing vessels have an LBP of less than 100 m, so they are not subject to the IMO maneuverability standard. This has led to reduced demand for these predictions or trials, which means little data is available [2,3]. In other words, while the maneuverability studies for a vessel to which the IMO maneuverability criteria for 100 m length or longer are applied and are actively conducted from the design stage, this has not been the case with most types of fishing vessels of less than 100 m, and the results of studies conducted on merchant vessels have been accepted and applied as they are [4].…”

Section: Introductionmentioning

confidence: 99%

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

Chae

2021

JMSE

Self Cite

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.