The goal of this study is to develop a proper design for the surrounding net of a stern fishing system. The experiments using the simplified model lampara net by various hanging ratios (E=0.5, 0.6, 0.7, 0.8, and 0.9) were carried out to analyze the sinking characteristics under static water conditions, and to observe the shape of the models being flowed.
The sinking speed of the model nets was different according to measuring points 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 reached the designed depth. The moved distance of the model net until the opening 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 hanging ratio of surrounding net for stern fishing system is E=0.7.