(a) is the vertical distance measured from the
keel line to the top of the working deck beam at side.
(b) In vessels 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 gunwale were of angular design.
(c) Where the working 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.