This part of IEC 60092 deals with the electrical installations in tankers carrying liquids which are flammable, either inherently, or due to their reaction with other substances, or flammable liquefied gases.
The requirements in other parts of IEC 60092 also apply to tankers, unless otherwise mentioned in this standard.
IEC 60092-502:1999 history
1999IEC 60092-502:1999 Electrical installations in ships - Part 502: Tankers - Special features
1994IEC 60092-502:1994 Electrical installations in ships - Part 502: Tankers - Special features
1970IEC 60092-502:1980 Electrical installations in ships - Part 502: Special features - Tankers