3.6.2.1 Enclosed superstructures complying with regulation 3(10)(b) of the 1966 Load Line Convention
may be taken into account.
3.6.2.2 The second tier of similarly enclosed
superstructures may also be taken into account.
3.6.2.3 Deckhouses on the freeboard deck may be
taken into account, provided that they comply with the conditions
for enclosed superstructures laid down in regulation
3(10)(b) of the 1966 Load Line Convention.
3.6.2.4 Where deckhouses comply with the above
conditions, except that no additional exit is provided to a deck above,
such deckhouses should not be taken into account; however, any deck
openings inside such deckhouses should be considered as closed even
where no means of closure are provided.
3.6.2.5 Deckhouses, the doors of which do not
comply with the requirements of regulation 12 of
the 1966 Load Line Convention should not be taken into account; however,
any deck openings inside the deckhouse are regarded as closed where
their means of closure comply with the requirements of regulations 15,
17 or 18 of the 1966 Load Line Convention.
3.6.2.6 Deckhouses on decks above the freeboard
deck should not be taken into account, but openings within them may
be regarded as closed.
3.6.2.7 Superstructures and deckhouses not regarded
as enclosed can, however, be taken into account in stability calculations
up to the angle at which their openings are flooded (at this angle,
the static stability curve should show one or more steps, and in subsequent
computations the flooded space should be considered non-existent).
3.6.2.8 In cases where the ship would sink due
to flooding through any openings, the stability curve should be cut
short at the corresponding angle of flooding and the ship should be
considered to have entirely lost its stability.
3.6.2.9 Small openings such as those for passing
wires or chains, tackle and anchors, and also holes of scuppers, discharge
and sanitary pipes should not be considered as open if they submerge
at an angle of inclination more than 30°. If they submerge at
an angle or 30° or less, these openings should be assumed open
if the Administration considers this to be a source of significant
flooding.
3.6.2.10 Trunks may be taken into account. Hatchways
may also be taken into account having regard to the effectiveness
of their closures.