2.9.1 The design waterline shall be clearly and
permanently marked on the craft's outer sides by the load line mark
described below. This and the reference line described in 2.9.2.2 below shall be recorded in the
High-Speed Craft Safety Certificate. For craft where this is not practical,
e.g. amphibious air-cushion vehicles fitted with peripheral skirts,
defined deck reference points shall be provided, from which the freeboard
can be measured, and hence the draughts obtained.
2.9.2.1 The load line mark shall consist of a
ring with an outside diameter of 300 mm and width of 25 mm which is
intersected by a horizontal line of length 450 mm and having a breadth
of 25 mm, the upper edge of which passes through the centre of the
ring. The centre of the ring shall be placed at the longitudinal centre
of flotation in the displacement mode and at a height corresponding
to the design waterline.
2.9.2.2 To assist in verifying the position of
the load line mark, a reference line shall be marked on the hull at
the longitudinal centre of flotation by a horizontal bar having a
length of 300 mm and a breadth of 25 mm and having the upper edge
corresponding to the reference line.
2.9.2.3 Where practicable, the reference line
should be related to the uppermost deck at side. Where it is not possible,
the position of the reference line should be defined from the underside
of keel at the longitudinal centre of flotation.
2.9.2.4 The mark of the Authority by whom the
load lines are assigned may be indicated alongside the load line ring
above the horizontal line which passes through the centre of the ring,
or above and below it. This mark shall consist of not more than four
initials to identify the Authority's name, each measuring approximately
115 mm in height, and 75 mm in width.
2.9.2.5 The ring, lines and letters shall be painted
in white or yellow on a dark ground or in black on a light ground,
and permanently marked. The marks shall be plainly visible.
2.9.3
Verification
The High-Speed Craft Safety Certificate shall not be delivered
until the Administration has verified that the marks are correctly
and permanently indicated on the sides of the craft.