Oct. 12.] THE NEW ZEALAND GAZETTE. 3303

(II) When the number of such doors does not exceed 5—
(i) If the criterion numeral does not exceed 30, all
the watertight sliding doors may be operated by hand
only;
(ii) If the criterion numeral exceeds 30, but does not
exceed 60, all the watertight sliding doors may be either
dropping doors fitted with releasing and hand gear
operated at the door and from above the bulkhead deck
or doors operated by power.
(iii) If the criterion numeral exceeds 60, all the water-
tight sliding doors shall be operated by power.
(b) If watertight doors which have sometimes to be open at sea
for the purpose of trimming coal are fitted between bunkers in the
between-decks below the bulkhead deck, these doors shall be operated
by power. The opening and closing of these doors shall be recorded
in the official log book.
(c) When trunkways in connection with refrigerated cargo are
carried through more than one main transverse watertight bulkhead,
and the sills of the openings are less than 7 feet (2·13 metres) above
the deepest subdivisions loadline, the watertight doors at such open-
ings shall be operated by power.
(10) Portable plates on bulkheads shall not be permitted except in
machinery spaces. Such plates shall always be in place before the ship
leaves port, and shall not be removed at sea except in case of urgent
necessity. The necessary precautions shall be taken in replacing them
to ensure that the joints shall be watertight.
(11) All watertight doors shall be kept closed during navigation
except when necessarily open for the working of the ship, and shall
always be ready to be immediately closed.
(12) Where trunkways or tunnels for access from crew’s accommoda-
tion to the stokehold, for piping, or for any other purpose are carried
through main transverse watertight bulkheads, they shall be watertight
and in accordance with the requirements of Regulation XII. The access
to at least one end of each such tunnel or trunkway, if used as a passage
at sea, shall be through a trunk extending watertight to a height
sufficient to permit access above the margin line. The access to the
other end of the trunkway or tunnel may be through a watertight door
of the type required by its location in the ship. Such trunkways or
tunnels shall not extend through the first subdivision bulkhead abaft
the collision bulkhead.
Where it is proposed to fit tunnels or trunkways for forced draft,
piercing main transverse watertight bulkheads, these shall receive the
special consideration of the Administration.

REGULATION X.

Openings in Ship’s Sides below the Margin Line.

(1) The arrangement and efficiency of the means for closing any
opening in the ship’s sides shall be consistent with its intended purpose
and the position in which it is fitted and generally to the satisfaction of
the Administration.
(2) (a) If in a between decks, the sills of any sidescuttles are below
a line drawn parallel to the bulkhead deck at side, and having its
lowest point 2½ per cent. of the breadth of the ship above the deepest
subdivision loadline, all sidescuttles in that between deck shall be of a
non-opening type.
(b) If in a between decks, the sills of any sidescuttles other than
those required to be of a non-opening type by subparagraph (a) are
below a line drawn parallel to the bulkhead deck at side and having its
lowest point at a height of 12 feet (3·66 metres) plus 2½ per cent. of
the breadth of the ship above the deepest subdivision loadline, all
sidescuttles in that between decks shall be of such construction as will
effectively prevent any person opening them without the consent of
the master of the ship.
(c) Other sidescuttles may be of any ordinary opening type.
(d) If in a between decks, the sills of any of the sidescuttles referred
to in subparagraph (b) are below a line drawn parallel to the bulkhead
deck at side and having its lowest point 4½ feet (1·37 metres), plus
2½ per cent. of the breadth of the ship above the loadline at which the
ship is floating on her departure from any port, all the sidescuttles in
that between decks shall be closed watertight and locked before the
ship leaves port and they shall not be opened during navigation.
The time of opening such sidescuttles in port and of closing and
locking them before the ship leaves port shall be entered in the official
log book.