13- 188 C.M.R. ch. 34, § 02
Mesh size of gillnet gear shall be measured by lining up five consecutive knots perpendicular to the float line and, with a ruler or tape measure, measuring ten consecutive measures on the diamond, inside knot to inside knot. The mesh shall be the average of the measurements of ten consecutive measures.
Mesh size for nets other than gillnets, shall be measured with a DMR issued net measure which has been certified for accuracy.
Square mesh in the regulated portion of the net is measured by placing the net gauge along the diagonal line that connects the largest opening between opposite corners of the square. The square mesh size is the average of the measurements of 20 consecutive adjacent meshes from the terminus forward along the long axis of the net. The square mesh is measured at least five meshes away from the lacings of the net.
Diamond mesh in the regulated portion of the net shall be measured in a direction parallel to the long axis of the net. Mesh size is determined by averaging the measurements for a series of 20 consecutive meshes. Mesh measurements must be taken at least five meshes away from the lacings of the net.
13- 188 C.M.R. ch. 34, § 02