This study investigated the drag coefficient and lift coefficient of thirteen kinds of knotless nettings used for large purse seine gear. By comparing the hydrodynamic characteristics with nets of the previous study, the characteristics of this study were derived as a purse seine gear. Thirteen kinds of nettings with different length of bar () and diameter () were used in the experiment, out of which six kinds used the 30 mm in mesh size and three kinds with 40 mm. The drag coefficient ( ) also increased with increasing . It can be expressed as        at a current speed 0.4 m/s and        at a current speed 0.5 m/s. Compared with previous studies, drag coefficient values were similar to knotless net of similar  and smaller than drag coefficient of knot net. Therefore, using knotless net in a purse seine has the advantage of reducing the resistance acting on the purse seine gear.

• 강다영(국립수산과학원 수산공학과) | Da-Young KANG (Fisheries Engineering Division, National Institute of Fisheries Science)
• 김현영(국립수산과학원 수산공학과) | Hyun-Young KIM (Fisheries Engineering Division, National Institute of Fisheries Science)
• 구명성(국립수산과학원 수산공학과) | Myeong-Seong KOO (Fisheries Engineering Division, National Institute of Fisheries Science)
• 이춘우(부경대학교 해양생산시스템관리학부) | Chun-Woo LEE (Division of Marine Production System Management, Pukyong National University)
• 차봉진(국립수산과학원 수산공학과) | Bong-Jin CHA (Division of Marine Production System Management, Pukyong National University)