6.7.1
footnote
Ventilators in
ships to which the International Convention on Load Lines, 1966, applies
should comply with regulation 19 and air
pipes should comply with regulation 20 of
this Convention.
6.7.2
footnote
Ventilators in
fishing vessels to which the 1993 Torremolinos Protocol applies should
comply with regulation II/9 and
air pipes should comply with regulation II/10 of this Protocol. Sounding devices should comply with regulation II/11 of this Protocol.
6.7.3 Ventilators and air pipes in fishing vessels
of 12 m in length and over but less than 24 m in length should comply
with the following:
-
.1 Ventilators should have coamings of substantial
construction and should be capable of being closed weathertight by
devices permanently attached to the ventilator or adjacent structure.
Ventilators should be arranged as close to the vessel's centreline
as possible and, where practicable, should extend through the top
of a deck erection or companionway.
-
.2 The coamings of ventilators should be as high
as practicable. On the working deck the height above deck of coamings
of ventilators, other than machinery space ventilators, should be
not less than 760 mm and on superstructure decks not less than 450
mm. When the height of such ventilators may interfere with the working
of the vessel their coaming heights may be reduced to the satisfaction
of the competent authority. The height above deck of machinery space
ventilator openings should be to the satisfaction of the competent
authority.
-
.3 Closing appliances need not be fitted to ventilators
the coamings of which extend more than 2.5 m above the working deck
or more than 1.0 m above a deckhouse top or superstructure deck.
-
.4 Where air pipes to tanks or other spaces below
deck extend above the working or superstructure decks the exposed
parts of the pipes should be of substantial construction and, as far
as is practicable, located close to the vessel's centreline and protected
from damage by fishing or lifting gear. Openings of such pipes should
be protected by efficient means of closing, permanently attached to
the pipe or adjacent structure, except that where the competent authority
is satisfied that they are protected against water trapped on deck,
these means of closing may be omitted.
-
.5 Where air pipes are situated near the side
of the vessel their height above deck to the point where water may
have access below should be at least 760 mm on the working deck and
at least 450 mm on the superstructure deck. The competent authority
may accept reduction of the height of an air pipe to avoid interference
with the fishing operations.
6.7.4 In offshore supply vessels air pipes and
ventilators should comply with the following:
-
.1 Air pipes and ventilators should be fitted
in protected positions in order to avoid damage by cargo during operations
and to minimize the possibility of flooding. Air pipes on the exposed
cargo and forecastle decks should be fitted with automatic closing
devices.
-
.2 Due regard should be given to the position
of machinery space ventilators. Preferably they should be fitted in
a position above the superstructure deck, or above an equivalent level
if no superstructure deck is fitted.