A large percentage of maritime accidents in coastal seas are related to small fishing vessels. In order to investigate causes of maritime accidents, it is often necessary to carry out dynamic simulations for the estimation of trajectories and motions of vessels. Initial conditions of vessels such as main dimensions, loading conditions and hydrostatic properties are required for the accurate simulations. Small fishing vessels usually have few records of hydrostatic properties during their fishing operations. Therefore, in this study, estimation procedures for hydrostatic properties of small fishing vessels are proposed. At first, hull form characteristics of Korean small fishing vessels are investigated. Most of vessels have hard-chines and centerline skegs, they have similar hull forms. Bonjean curves of several small fishing vessels whose gross tonnages are below 10 tons are normalized with vessel breadths and depths. Representative bonjean curves are derived from normalized bonjean curves, and a representative hull plan is obtained as well. If the vessel loading conditions such as total weights and centers of gravity are given, fore and aft drafts can be calculated by using the representative bonjean curves with the constraint that weights and buoyancies are in equilibrium. Metacentric heights are also estimated by using the representative hull plan. Drafts and metacentric heights estimated by proposed iterative estimation procedures are compared with actual vessel data, estimated values are in good agreements with actual values. In addition, normalized fore and aft drafts, metacentric heights of vessels can be formulated as the linear functions of normalized total weights and centers of gravity. Empirical formulas of drafts and metacentric heights are proposed, and it is confirmed that the empirical formulas also provide reasonable results, which are similar to the results by iterative estimation procedures with representative bonjean curves and hull plan.

沿海海域的大部分海上事故与小型渔船有关。为了调查海事事故的原因，通常有必要进行动态仿真来估计船只的轨迹和运动。精确的模拟需要容器的初始条件，例如主要尺寸，载荷条件和静水性能。小型渔船通常在捕鱼过程中没有静水性能的记录。因此，在这项研究中，提出了小型渔船静水性能的估算程序。首先，研究了韩国小型渔船的船体形态特征。大多数船只具有硬下巴和中心线骨，它们具有相似的船体形式。总吨位在10吨以下的几艘小型渔船的Bonjean曲线根据船宽和深度进行了归一化。代表性的bonjean曲线是从归一化的bonjean曲线导出的，并且还可以获得代表性的船体计划。如果给出了诸如总重和重心之类的船舶装载条件，则可以通过使用代表性的bonjean曲线来计算前后吃水深度，并限制重量和浮力处于平衡状态。也可以通过使用代表性的船体计划来估算亚中心高度。将拟议的迭代估算程序估算的吃水深度和偏心高度与实际船只数据进行比较，估算值与实际值高度吻合。此外，标准化的前后吃水，血管的亚中心高度可以公式化为归一化总重量和重心的线性函数。提出了吃水深度和偏心高度的经验公式，并证实了经验公式也提供了合理的结果，这与具有代表性的邦简曲线和船体计划的迭代估计程序的结果相似。