Section
1 General
1.1 Scope and application
1.1.1 The
requirements of this Chapter are additional for passenger ships and
are related to machinery and equipment providing services necessary
to support safe return to port under the ship’s own propulsion
in the event of flooding or after a fire and to support orderly evacuation
and abandonment in the event of a fire.
1.1.2 The
requirements of this Chapter are restricted to machinery and equipment
specifically addressed by relevant engineering systems Rules.
1.1.6 The performance of machinery and equipment for services referred to in the
relevant SOLAS Regulations that are not specifically addressed by relevant engineering
systems Rules are not considered (e.g. basic services to safe areas,
radiocommunications, navigation systems, etc.). However, these services are to be
considered in terms of:
-
the supply of electrical power in accordance with SOLAS 1974, as
amended; and
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protection provided to machinery and equipment described in Pt 5, Ch 23, 1.1 Scope and application 1.1.2 (e.g. fire suppression measures in spaces
containing propulsion machinery).
1.1.7 These
requirements do not address operational decisions on the actual use
of machinery and equipment in the event of flooding or fire (e.g.
the use of propulsion and steering in a flooding damage condition).
1.2 Definitions
1.2.1 For
the purposes of this Chapter, ‘the relevant SOLAS Regulations’
refers to SOLAS 1974, as amended:
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Chapter II-1/B-1, Regulation 8-1 - System capabilities and operational information after a flooding casualty on passenger ships, ;
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Chapter II-2/G, Regulation 21 - Casualty threshold, safe return to port and safe areas, ; and
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Chapter II-2/G, Regulation 22 - Design criteria for systems to remain operational after a fire casualty, . Pt 5, Ch 23, 1.2 Definitions 1.2.1 and Pt 5, Ch 23, 1.2 Definitions 1.2.1.(b) apply for Pt 5, Ch 23, 2 Safe return to port and Pt 5, Ch 23, 3 Qualitative failure analysis for propulsion, steering and essential services, Pt 5, Ch 23, 1.2 Definitions 1.2.1.(c) applies for Pt 5, Ch 23, 4 Orderly evacuation and abandonment after a casualty.
1.2.3 The
‘casualty threshold’ in the context of a fire includes:
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loss of space
of origin up to the nearest ‘A’ class boundaries, which
may be a part of the space of origin, if the space of origin is protected
by a fixed fire extinguishing system; or
-
loss of the space
of origin and adjacent spaces up to the nearest ‘A’ class
boundaries, which are not part of the space of origin.
1.2.5 ‘Safe
areas’ are those that will be available, during a ship’s
return to port under its own propulsion after a casualty that does
not exceed the casualty threshold stipulated, to provide the basic
services to ensure that the health of passengers and crew is maintained.
1.2.7 A ‘failure’
is the termination of the ability of an item to perform a required
function. For the purposes of Pt 5, Ch 23, 3 Qualitative failure analysis for propulsion, steering and essential services:
-
failures result
from a fault in a component or system such that it cannot perform
an intended or required function, including faults resulting from
fire or flooding damage;
-
‘common
cause failures’ are those failures which will cause more than
one item to fail simultaneously, or within a sufficiently short period
of time as to have the effect of simultaneous failures; and
-
‘consequential
failures’ are secondary failures caused by the effects of a
primary failure, i.e. where the occurrence of a failure leads directly
to further failures.
1.3 General requirements and risk management
1.3.1 For
passenger ships having a length of 120 m or more, or having 3 or more
main vertical zones, it is the responsibility of the Shipbuilder to
ensure that the arrangement of the ship’s machinery and equipment
as described in Pt 5, Ch 23, 1.1 Scope and application 1.1.2 are
sufficient for the intended operating modes and to support the provision
of the services that the National Administration has determined to
be necessary for:
-
the ship’s
safe return to port under its own propulsion, see
Pt 5, Ch 23, 2 Safe return to port:
-
after a casualty
that does not exceed the casualty threshold; or
-
when the
ship is subject to flooding of any single watertight compartment;
and/or
-
supporting the
orderly evacuation and abandonment of the ship if the casualty threshold
is exceeded, see
Pt 5, Ch 23, 4 Orderly evacuation and abandonment after a casualty.
This necessitates activities, which will normally be risk based,
to determine the machinery and equipment needed to remain operational
for a period of time to satisfy the requirements of the relevant SOLAS
Regulations to the satisfaction of the National Administration. These
activities are to be carried out prior to the submission of plans
in accordance with this Chapter.
1.3.2 The
activities referred to in Pt 5, Ch 23, 1.3 General requirements and risk management 1.3.1 may
be conducted at the same time, or in conjunction with, activities
to determine the criteria that the National Administration specify
as necessary to achieve overall compliance with the relevant SOLAS
Regulations. The ship’s intended operational routes and/or service
restrictions may be considered when establishing criteria.
1.3.3 It
is the responsibility of the Shipbuilder to ensure that watertight
and fire divisions, fire-fighting systems and bulkhead decks shown
on the plans are those approved by the National Administration.
1.3.4 Where
alternatives to the requirements of this Chapter are proposed, details
demonstrating that the machinery and engineering systems comply with
the relevant SOLAS Regulations are to be submitted for consideration.
1.4 Plans and information
1.4.2 The
analysis report described in Pt 5, Ch 23, 3.1 General 3.1.5 that includes the following information:
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identification
of any applicable standards used for analysis of the design;
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description of
the analysis team and their roles for information only;
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identification
of the objectives of the analysis, including any National Administration
acceptance criteria;
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identification
of assumptions made in the analysis;
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description of
intended system function under normal conditions and in the event
of fire or flooding;
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identification
of the equipment, system or sub-system and mode of operation, including
the design plans and information considered;
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identification
of casualty scenarios, probable failure modes and acceptable deviations
from the intended or required function;
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evaluation of
the local effects and the effects on the overall installation of each
failure mode as applicable;
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identification
of the worst case scenario in the event of a fire casualty or flooding,
as described in Pt 5, Ch 23, 2.1 General 2.1.1, and
an assessment of the ship’s ahead and astern manoeuvring capability
under these conditions (IMO Resolution MSC.137(76) - Standards for Ship Manoeuvrability - (adopted on 4 December 2002), provides standards
to assess the manoeuvrability of ships); and
-
trials, testing
and other activities necessary to verify compliance with Pt 5, Ch 23, 3 Qualitative failure analysis for propulsion, steering and essential services. The final report described
in Pt 5, Ch 23, 3.1 General 3.1.5.(b) is to be submitted
once the proposed design is finalised.
1.4.5 Details
of National Administration criteria (see also
Pt 5, Ch 23, 1.3 General requirements and risk management 1.3.1), including:
-
service speed,
manoeuvring capability and time period of operation and ship range
for ship return to port under its own propulsion;
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systems determined
to be vital to damage control efforts;
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identification
of required internal communications arrangements; and
-
identification
of navigation light circuits to be capable of operation during return
to port.
1.4.6 General
arrangement plans of the ship showing the location of machinery and
equipment, piping systems, cables and controls stations to be employed
for:
-
each of the services
described in Pt 5, Ch 23, 2.1 General 2.1.2, Pt 5, Ch 23, 2.1 General 2.1.3, and Pt 5, Ch 23, 4.1 General 4.1.2; and
-
the provision
of electrical power described in Pt 5, Ch 23, 2.1 General 2.1.4 and Pt 5, Ch 23, 4.1 General 4.1.3.
The plans are to identify:
-
watertight compartments
and the bulkhead deck; and
-
for passenger
ships having a length of 120 m or more or having three or more main
vertical zones:
-
safe areas
in the context of a casualty; and
-
casualty
threshold ‘A’ class structural fire protection boundaries.
The plans are to indicate segregation and fire/flooding protection
measures and access arrangements for machinery spaces and associated
control stations. These plans are also to be made available to the
Surveyor on board.
1.4.8 Identification
and details:
-
equipment designed
to operate in flooded spaces or under fire conditions; and/or
-
other flooding
or fire protection measures.
1.4.11 Details
of time period of operation and ship range and service speed corresponding
to fuel storage capacity available in the event of fire or flooding
scenarios.
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