1.2.1 The status of these Guidelines is advisory.
They are intended to cover the design and operation of:
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.1 inert gas systems that are required on new
tankers by regulation 60 of chapter II-2 of
the 1978 SOLAS Protocol and in accordance with regulation 62;
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.2 inert gas systems that are required on existing
tankers by regulation 60 of chapter II-2 of
the 1978 SOLAS Protocol and in accordance with regulation 62.20;
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.3 inert gas systems which are fitted but not
required to comply with the requirements of regulation 60 of chapter II-2 of the 1978 SOLAS Protocol.
1.2.2 However, for existing inert gas systems
the Guidelines are directed primarily at operational procedures and
are not intended to be interpreted as requiring modifications to existing
equipment other than those which are required on ships to which regulation 62.20 applies.
1.2.3 The content of these Guidelines is based
on current general practice used in the design and operation of inert
gas systems using flue gas from the uptake from the ship's main or
auxiliary boilers, and installed on crude oil tankers and combination
carriers. The Guidelines do not exclude other sources of inert gas,
such as systems incorporating independent inert gas generators, other
designs, materials or operational procedures. All such divergences
should be carefully assessed to ensure that they achieve the objectives
of these Guidelines.