At ship design stage, the maneuverability is generally estimated based on the empirical formula or the computational fluid dynamic (CFD), which is one of the numerical simulation methods. Using the hydrodynamic derivatives derived through these methods can quantitatively estimate the maneuverability of target vessels and evaluate indirect maneuverability. Nevertheless, research on estimating maneuverability is insufficient for ships not subject to IMO maneuverability standard, especially fishing vessels, and even at the design stage, the empirical formula developed for merchant ships is applied without modification. An estimation error may occur due to the empirical formula derived from the regression analysis results of a model test if the empirical formula developed for merchant ships with different hull shapes is applied to fishing vessels without any modification. In this study, the modified empirical formula that can more accurately estimate the fishing vessel's maneuverability was derived by including the hull shape parameter of target fishing trawlers in the regression analysis process that derives Kijima et al. (1990) formula. As a result, the modified empirical formula showed an average estimation error of 6%, and the result improved the average error of 49% of Kijima et al. (1990) formula developed for merchant ships.

서 론
재료 및 방법
    기본 수학 모델
    Kijima et al. (1990)경험식
    대상선박
    수치 시뮬레이션
결과 및 고찰
    유체력 미계수와 선형 특성 계수의 상관관계
    보정 경험식 도출
    보정 경험식의 유효성 검증
결 론
References

• 김수형(부경대학교 실습선) | Su-Hyung KIM (Training ship, Pukyong National University)
• 이춘기(한국해양대학교 항해학부) | Chun-Ki LEE (Div. of Navigation Science, Korea Maritime and Ocean University) Corresponding author
• 이민규(부경대학교 선박실습운영센터) | Min-Gyu LEE (Training ship Management center, Pukyong National University)