(a) The moulded depth is the vertical distance
measured from the top of the keel to the underside of the upper deck
at side. In wood and composite ships the distance is measured from
the lower edge of the keel rabbet. Where the form at the lower part
of the midship section is of a hollow character, or where thick garboards
are fitted, the distance is measured from the point where the line
of the flat of the bottom continued inwards cuts the side of the keel.
(b) In ships having rounded gunwales, the moulded
depth shall be measured to the point of intersection of the moulded
lines of the deck and side shell plating, the lines extending as though
the gunwales were of angular design.
(c) Where the upper deck is stepped and the raised
part of the deck extends over the point at which the moulded depth
is to be determined, the moulded depth shall be measured to a line
of reference extending from the lower part of the deck along a line
parallel with the raised part.