(1) Side scuttles to spaces below the freeboard
deck or to spaces within enclosed superstructures shall be fitted
with efficient hinged inside deadlights arranged so that they can
be effectively closed and secured watertight.
(2) No side scuttle shall be fitted in a position
so that its sill is below a line drawn parallel to the freeboard deck
at side and having its lowest point 2.5 per cent of the breadth (B)
above the load waterline, or 500 millimetres (19½ inches),
whichever is the greater distance.
(3) The side scuttles, together with their glasses,
if fitted, and deadlights, shall be of substantial and approved construction.