(1) A reduction in door sill height is allowed to the satisfaction of the
Administration in accordance with section 2.5(5), provided that the
vessel has increased freeboard in accordance section 2.2(2), and can
comply with the enhanced survivability standard as defined in
section 4.30, with the space or spaces to which the door leads
flooded as per 2.17(4).
(2) Hatches without any coamings are allowed in accordance with section
2.7(4), including, but not limited to, that the vessel can comply
with the enhanced survivability standard as defined in Section 4.30,
with the space or spaces to which the hatch leads flooded as per
2.17(4).
(3) Miscellaneous Openings in Freeboard and Superstructure Decks may have
reduced coamings considered in accordance with section 2.8(2)
subject to the vessel being able to comply with the enhanced
survivability standard in section 4.30, with the space or spaces to
which the opening leads flooded as per 2.17(4).
(4) Where compliance with the enhanced survivability standard in section 4.30,
with the space or spaces to which the opening leads flooded is
required, the compartment supplied by the opening is to be assumed
to be flooded to the outside waterline. With the compartment flooded
the vessel must be shown to meet the criteria set out in Section
4.30.