8A.2.1 Lighting circuits, including those for
emergency lighting, should be distributed through the spaces so that
a total blackout cannot occur due to failure of a single protective
device.
8A.2.2 An emergency source of lighting should
be provided which should be independent of the general lighting system.
This source should be sufficient for up to 3 hours duration and should
include navigation light supplies. The lighting is to provide sufficient
lighting for personnel to escape from the accommodation or working
spaces to their muster station, and launch and board survival craft.
Additionally, this light, supplemented by torches, should be sufficient
to permit emergency repairs to machinery, etc.