An estimation of the headline height of a bottom trammel net set across under uniform current was achieved numerically from a differential equations describing the forces of the net and compared with the measured value in a flume tank experiment. The analysis on the shape of the bottom trammel net with the headline free was based on the equilibrium equation of the bottom gill net which was modified and slack of the trammel net was varied with net depth as shown in the tank experiment. The differential equations were solved by a forth-order Runge-Kutta method. The estimated headline heights with varied slack was found to be closer than that with constant slack when compared with the actual values.

• 박해훈 | Park, Hae-Hoon
• 원성재 | Won, Sung-Jae
• 양준용 | Yang, Joon-Yong
• 배재현 | Bae, Jae-Hyun
• 윤홍근 | Yoon, Hong-Keun