This study investigates the effects of canopy fabric material and vent diameter on the deployment performance of sea anchors for fishing operations through field experiments. Three canopy configurations were tested: polyamide (PA), polyester (PES), and a PA – PES alternating combination. Vent diameters of 80 cm and 40 cm were applied to each fabric as controlled structural factors. Deployment performance was evaluated from entrance diameter computed using four evenly spaced water level loggers, and maximum towing tension was recorded with a load cell. Key findings were discovered as follows: PES and the PA – PES mix achieved deployment diameter/ratio and maximum tension comparable to the current PA standard, indicating practical substitutability. PES also exhibited superior stability, showing reduced variability even with the smaller vent (a change in standard deviation ΔSD-1.75 cm). The mixed canopy maintained performance similar to PA. As expected, vent diameter systematically affected geometry and load (80 cm: 187 – 198 kgf vs. 40 cm: 249 – 268 kgf), underscoring the need to pair material selection with appropriate vent sizing. In conclusion, PES and mixed fabrics are viable alternatives to PA, and co-optimization of fabric choice and vent diameter can enhance sea-anchor performance, durability, and operational reliability for fishing operations.

서 론
재료 및 방법
    실물 씨앵커 설계 및 제작
    실험 방법
    실험 기상 조건
    결과 및 고찰
    전개 직경 변화
    물돛줄의 장력 변화
결 론
사 사
References

• 김남구(한국해양수산연수원 오션폴리텍수산팀 실습선 선장) | Namgu KIM (Captain, Training Ship, Oceanpolytech Fisheries Team, Korea Institute of Maritime and Fisheries Technology, Busan 49111, Korea)
• 박태건(한국해양수산연수원 오션폴리텍수산팀 교수) | Tae-Gun PARK (Professor, Oceanpolytech Fisheries Team, Korea Institute of Maritime and Fisheries Technology, Busan 49111, Korea)
• 유영재(국립부경대학교 해양생산관리학부, 수산물리학전공 대학원생) | Youngjae YU (Graduate Student, Division of Marine Production Management (Major in Fisheries Physics), Pukyong National University, Busan 48513, Korea)
• 이유원(국립부경대학교 해양생산시스템관리학부 교수) | Yoo-Won LEE (Professor, Division of Marine Production System Management, Pukyong National University, Busan 48513, Korea)
• 류경진(국립부경대학교 해양생산시스템관리학부 교수) | Kyung-Jin RYU (Professor, Division of Marine Production System Management, Pukyong National University, Busan 48513, Korea) Corresponding author