This study investigates the effects of marine biofouling on the propulsion performance of a 2.99-ton HDPE (High-Density Polyethylene) coastal fishing vessel through full-scale sea trials. Four operating conditions, clean hull, fouled hull, partially cleaned hull, and completely cleaned hull, were tested to analyze changes in ship speed and engine revolutions. The maximum speed decreased from 32.2 kn in the clean condition to 18.7 kn under fouling, corresponding to a 42% reduction in performance, and recovered to 29.0 kn (about 90% of the original speed) after complete cleaning. Additionally, immersion tests of HDPE, FRP, and aluminum panels showed that all materials experienced severe fouling during spring and summer; however, HDPE surfaces exhibited lower adhesion strength and easier removal of organisms. These findings confirm that hull cleanliness has a significant influence on the propulsion efficiency of small vessels and highlight the necessity of proactive cleaning to maintain HDPE vessel performance. Future research will include comparative evaluations with FRP and aluminum vessels to assess the substitution potential of HDPE hulls and provide technical evidence for the wider adoption of eco-friendly fishing vessels.

서 론
재료 및 방법
    선체부착생물의 종류 및 특성
    HDPE 시편 침지시험 및 실선 성능 평가
결과 및 고찰
결 론
사 사
References

• 김청룡(한국조선해양기자재연구원 연안해상기술연구센터 책임연구원) | Chung-Ryong KIM (Principal Researcher, Coastal Maritime Technology Research Center, Korea Marine Equipment Research Institute, Mokpo 58762, Korea)
• 권수연(한국해양교통안전공단 어선안전연구TF 팀장) | Soo-Yeon KWON (Team Leader, Fishing Vessel Safety Research TF, Korea Maritime Transportation Safety Authority, Sejong 30100, Korea) Corresponding author
• 박정경(한국조선해양기자재연구원 해양환경센터 팀장) | Jeong-Kyeong PARK (Team Leader, Marine Environment Center, Korea Marine Equipment Research Institute, Busan 46754, Korea)