The dragnet boat of 57ft uses GloriaNo.512 dragnet, net mouth is stretched amount to 135m, halftone of use 104in Thyboron, can undertake middle-level or bottom trawl fish.

• 57ft的拖网船使用GloriaNo.；512拖网；网口张开达135m；使用104in Thyboron网板；可以进行中层或底层拖网捕鱼。