46 C.F.R. § 42.13-25 Load line mark.
Title 46 - Shipping
(a) The load line mark shall consist of a ring 12 inches in outside diameter and 1 inch wide which is intersected by a horizontal line 18 inches in length and 1 inch in breadth, the upper edge of which passes through the center of the ring. The center of the ring shall be placed amidships and at a distance equal to the assigned summer freeboard measured vertically below the upper edge of the deck line (as illustrated in Figure 42.13–25(a)). [CGFR 68–60, 33 FR 10059, July 12, 1968]
Title 46: Shipping
PART 42—DOMESTIC AND FOREIGN VOYAGES BY SEA
Subpart 42.13—General Rules for Determining Load Lines
§ 42.13-25 Load line mark.