5.5.2 The red crab trap is a trap made with a frame whose cross-sectional shape, when viewed from the front, is conical, using wire with a diameter of 3 to 12mm for the coastal trap. It is covered with a net made of PE Td260 27-ply mesh with a mesh size of 125mm or more, and has one entrance at the top made of acrylic or plastic. Bait is placed inside to lure and catch the target organisms. When arriving at the fishing ground, the traps set during the previous voyage are lifted first. During the lifting, the engine of the boat is stopped, and the boat moves forward with the pulling power of winding the warp, and the warp is wound up through the guide roller at the bow port to the hydraulic lifter at the starboard. The lifted trap is then placed on the port side.