is a watertight bulkhead up to the working deck in the forepart
of the vessel which meets the following conditions:
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(a) The bulkhead shall be located at a distance
from the forward perpendicular:
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(i) not less than 0.05L and not more
than 0.08L for vessels of 45 m in length and over;
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(ii) not less than 0.05L and not
more than 0.05L plus 1.35 m for vessels of less than
45 m in length except as may be allowed by the Administration;
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(iii) in no case, less than 2.0 m.
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(b) Where any part of the underwater body extends
forward of the forward perpendicular, e.g. a bulbous bow, the distance
stipulated in subparagraph (a) shall be measured from a point at mid-length
of the extension forward of the forward perpendicular or from a point
0.015L forward of the forward perpendicular, whichever
is less.
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(c) The bulkhead may have steps or recesses provided
they are within the limits prescribed in subparagraph (a).