The deck line is a horizontal line 300 mm in length and
25 mm in breadth. It shall be marked amidships on each side of the
ship, and its upper edge shall normally pass through the point where
the continuation outwards of the upper surface of the freeboard deck
intersects the outer surface of the shell (as illustrated in figure 4.1), provided that the deck line may
be placed with reference to another fixed point on the ship on condition
that the freeboard is correspondingly corrected. The location of the
reference point and the identification of the freeboard deck shall
in all cases be indicated on the International Load Line Certificate.
Figure 4.1 Deck line