A model experiment on the characteristic of fishing gear of lampara net with various hanging ratios

The goal of this study is to develop a proper design for the surrounding ne t of a stern fishing system. The experiments using the simplified model lam para net by various hanging ratios (E=0.5, 0.6, 0.7, 0.8, and 0.9) were car ried out to analyze the sinking characteristics under static water conditio ns, and to observe the shape of the models being flowed. The sinking speed of the model nets was different according to measuring po ints and the hanging ratios. In the final depth of lead line, the model net with E=0.9 reached the deepest but the ones with E=0.7 and E=0.8 barely re ached the designed depth. The moved distance of the model net until the ope ning area formed by its lead line slightly closed, was not different in all hanging ratios except E=0.8. These results suggest that the optimum hangin g ratio of surrounding net for stern fishing system is E=0.7.