7.1 Explosives associated with the special purpose
of the ship should be stored in one of the following categories of
magazines:
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.1 Integral magazines - those forming an integral
part of the ship;
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.2 Independent magazines - that are non-integral,
portable magazines with a capacity of 3 m3 or greater;
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.3 Magazine boxes - that are non-integral, portable
magazines with a capacity of less than 3 m3.
7.2 The following minimum provisions should be
applied bearing in mind that additional provisions may be required
by the Administration dependent on the nature of the explosives.
7.3 Integral magazines should not be located in
close proximity to and never below accommodation spaces and not in
close proximity to control spaces.
7.4 Integral magazines should not be located adjacent
to a boiler room, engine room, galley or other space presenting a
fire hazard. If it is necessary to construct the magazine in proximity
to these areas, a cofferdam of at least 0.6 m should be provided separating
the two spaces. Such a cofferdam should be provided with ventilation
and should not be used for stowage. One of the bulkheads forming the
cofferdam should be of A-15 construction unless there is adjacent
machinery space of category A in which case A-30 is appropriate.
7.5 Access to integral magazines should preferably
be from the open deck, but in no case through spaces mentioned in
paragraphs 7.3 and 7.4.
7.6 Independent magazines and magazine boxes should
be located on a weather deck in a location protected from direct impact
of the sea. The location should provide sufficient protection against
warm air or hazardous vapours being emitted from galleys, pump-rooms,
etc. Due regard should be paid to the possible risk of subjecting
certain explosives to radio emissions.
7.7 Magazine boxes should be located on a weather
deck at least 0.1 m from the deck and any deck-house and in a position
suitable for jettisoning the contents.
7.8 Integral magazines should be of permanent
watertight construction and formed by permanent A-15 class divisions.
A-0 class divisions may be allowed if spaces adjacent to the magazine
do not contain flammable products.
7.9 Magazines should be insulated with non-combustible
material as necessary to prevent the condensation of moisture.
7.10 Light fixtures installed in magazines should
be equipped with globes and guards. Control of lighting systems should
be from outside the magazine. An indicator light should be provided
at the switch location to indicate when circuits are energized. Other
electrical equipment and wiring should not be installed within or
pass through magazines except electrical cables enclosed in a watertight
trunk.
7.11 Piping of fresh or salt water and drainage
systems and piping systems installed in the magazines themselves may
be routed through magazines. Piping of other systems should be permitted
only if they are enclosed in a watertight trunk.
7.12 Magazines should be provided with a means
whereby they may be securely locked to prevent unauthorized access.
7.13 Racks, stanchions, battens, or other devices
should be installed to provide safe stowage of explosives in their
approved shipping containers with a minimum of dunnage.
7.14 Decks of magazines should be covered with
a permanent nonslip, nonspark covering.
7.15 Independent magazines should be of weathertight
metal construction. The interior should be insulated with a non-combustible
insulation providing an A-15 standard.
7.16 The electrical terminals on independent magazines
for connection to the ship's electrical system should be of watertight
construction and should bear a label plate denoting the power requirement
of the magazine.
7.17 Independent magazines should bear a label
plate stating light weight and maximum allowable weight of explosives.
7.18 Magazine boxes should be of watertight metal
construction having a body and lid thickness of not less than 3 mm.
Where the box may be exposed to direct sun, sun shields should be
provided.
7.19 Integral magazines should be provided with
natural or mechanical ventilation fitted with flame screen sufficient
to maintain the magazine temperature below 38°C.
7.20 Independent magazines should be provided
with efficient natural ventilation fitted with flame screen.
7.21 In integral and in independent magazines
a sprinkler system should be installed with an application rate of
24 l/m2 per minute. Equivalent means may be accepted by
the Administration. The controls should be clearly marked as to their
function.
7.22 Integral and independent magazines should
be clearly labelled indicating:
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.1 the space is a magazine
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.2 open lights and flame should be kept away
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.3 the magazine door should be kept shut
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.4 matches and lighters should be removed prior
to entering
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.5 not to lift with contents (in the case of independent
magazines).
7.23 Magazine boxes should be clearly labelled
indicating:
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.1 the container is a magazine box
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.2 open lights and flame should be kept away
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.3 the box should be kept shut.
7.24 Detonators should be stowed separately from
the other explosives.