A fitted single screen of corrosion-resistant wire of at least 30 by 30 mesh or two fitted screens, both of corrosion-resistant wire, of at least 20 by 20 mesh spaced not less than one-half inch or more than 1
1/2 inches apart.
source: CGFR 70-10, 35 FR 3714, Feb. 25, 1970, unless otherwise noted.
cite as: 46 CFR 151.03-25