The Load Line Mark shall consist of a ring 300 millimetres
(12 inches) in outside diameter and 25 millimetres (1 inch) wide which
is intersected by a horizontal line 450 millimetres (18 inches) in
length and 25 millimetres (1 inch) in breadth, the upper edge of which
passes through the centre of the ring. The centre 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 2).
Figure 2. Load Line Mark and lines to be used with this mark