3.7.1 The requirements of the 1966 Load Line Convention,
including those relating to certification, should apply to all units
and certificates should be issued as appropriate. The minimum freeboard
of units which cannot be computed by the normal methods laid down
by that Convention should be determined on the basis of meeting the
applicable intact stability, damage stability and structural requirements
for transit conditions and drilling operations while afloat. The freeboard
should not be less than that computed from the Convention where applicable.
3.7.2 The requirements of the 1966 Load Line Convention
with respect to weathertightness and watertightness of decks, superstructures,
deckhouses, doors, hatchway covers, other openings, ventilators, air
pipes, scuppers, inlets and discharges, etc., should be taken as a
basis for all units in the afloat condition.
3.7.3 In general, heights of hatch and ventilator
coamings. air pipes. door sills, etc., in exposed positions and their
means of closing should be determined by consideration of both intact
and damage stability requirements.
3.7.4 All downflooding openings which may become
submerged before the angle of inclination at which the required area
under the intact righting arm curve is achieved should be fitted with
weathertight closing appliances.
3.7.5 With regard to damage stability, the requirements
in 3.4.3.2, 3.4.4 and 3.6.6 should apply.
3.7.6 Administrations should give special consideration
to the position of openings which cannot be closed in emergencies,
such as air intakes for emergency generators, having regard to the
intact righting arm curves and the final waterline after assumed damage.