本研究では、漁船船型を有する練習船を対象とした模型試験によって喫水およびトリムを変化させた際の主船体流体力および波漂流力を計測した。さらにこれらの特性を踏まえた上で、規則波による漂流試験結果から載荷状態が船体の漂流運動に及ぼす影響について考察を行った。その結果、次のことが明らかとなった。（1）主船体流体力は、船尾トリムの増加に伴って横力の作用位置が船尾側へ移動するが、喫水による変化はほとんど見られなかった。%It is known that a loading condition of fishing vessel changes frequently with fish catching and fuel oil consumption. This paper describes the study on influence of loading condition on drifting motion of fishing vessel in a regular wave. To investigate the influence, model experiments to measure hydrodynamic forces and wave drift forces acting on a hull in various loading conditions were carried out. Based on the characteristics of the forces, the results of drifting motion test in a regular wave were examined. As the results, it was found that the trim condition of vessel affects drifting motion significantly. Therefore, it is important to consider the trim condition of vessel for the prediction of drifting motion.
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