3.6.1 The moulded depth D1 is the vertical
distance measured from the top of the keel to the top of the freeboard deck
beam at side. 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.
In ships having rounded gunwales, the moulded depth is to be measured to the point of intersection of the moulded lines of deck and sides, the lines extending as though the gunwales were of angular design.
Where the freeboard 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 is to be measured to a line of reference extending from the lower part of the deck along a line parallel with the raised part.