For the purposes of these guidelines, the following
definitions apply:
2.1
Alternative design and arrangements means
fire safety measures which deviate from the prescriptive requirement(s)
of SOLAS chapter II-2, but are suitable
to satisfy the fire safety objective(s) and the functional requirements
of that chapter. The term includes a wide range of measures, including
alternative shipboard structures and systems based on novel or unique
designs, as well as traditional shipboard structures and systems that
are installed in alternative arrangements or configurations.
2.2
Design fire means an engineering
description of the development and spread of fire for use in a design
fire scenario. Design fire curves may be described in terms of heat
release rate versus time.
2.3
Design fire scenario means a
set of conditions that defines the fire development and the spread
of fire within and through ship space(s) and describes factors such
as ventilation conditions, ignition sources, arrangement and quantity
of combustible materials and fire load accounting for the effects
of fire detection, fire protection, fire control and suppression and
fire mitigation measures.
2.4
Functional requirements explain,
in general terms, what function the ship should provide to meet the
fire safety objectives of SOLAS.
2.5
Performance criteria are measurable
quantities stated in engineering terms to be used to judge the adequacy
of trial designs.
2.6
Prescriptive based design or prescriptive
design means a design of fire safety measures which comply
with the prescriptive regulatory requirements set out in parts B,
C, D, E or G of SOLAS chapter II-2.
2.7
Safety margin means adjustments
made to compensate for uncertainties in the methods and assumptions
used to evaluate the alternative design, e.g. in the determination
of performance criteria or in the engineering models used to assess
the consequences of fire.
2.8
Sensitivity analysis means an
analysis to determine the effect of changes in individual input parameters
on the results of a given model or calculation method.
2.9
SOLAS means the International
Convention for the Safety of Life at Sea, 1974, as amended.