Introduction
This standard has been developed taking into account the existing IMO guidance on the subject as listed in clause 6 Bibliography. The symbols in Annex A generally conform to the corresponding symbols given in IMO Resolutions A.654(18) Graphical symbols for fire control plans and A.760(18) Symbols related to life-saying appliances and arrangements but, as far as the symbols for fire plans are concerned, it was deemed necessary to carry out the following changes：
- the colour code given in ISO 14726 Identification colours for the content of piping systems has been adopted in order to render more evident the various types of systems/content of equipment present on board and for which the same symbol is used. This reduces the number of symbols referring to similar systems or equipment and, consequently, avoids cluttering of the plans; and
with the aim of rendering them more comprehensible to people on board (passengers included) and to shoreside fire-fighting personnel, who might be called to operate onboard, a small number of symbols (e.g., the one referring the fire hydrant and hose) contained in IMO Resolutions A.654(18) have been modified in order to harmonise them with ISO 6309：1987 Fire protection - Safety signs and ISO 3864：1998 Safety colours and safety signs.
