2.1 Where the location of openings can lead to
significant downflooding, they should be taken properly into account
when carrying out the A/Amax calculations. Their status
should be identified by an on-board survey and the details of such
openings should be updated, if necessary, on the damage control plan.
2.2 When carrying out the calculations to establish
the A/Amax ratio, such downflooding openings should be
assumed closed watertight, or weathertight, as appropriate.
2.3 In order that a contribution to the `A' value
can be made, such downflooding openings should be closed to a credible
degree of tightness. Where internal doors are shown to be situated
above both the intermediate and final waterlines after assumed damage,
they are not required to be strictly watertight.