Compliance of "fire fighting equipment" for use on boats with Lithium batteries has been clarified by the RCD technical committee as :
So, such as the BMS, high voltage and high temp disconnects. smoke alarms etc are all part of fire fighting equipment
Taken from :
ISO 26325 referred to above is "Small Craft - Lithium Ion Batteries"
and states the following :
7 Fire protection and cell venting
7.1 Fire protection from thermal runaway — Lithium-ion batteries technologies have unique fire
characteristics. See Annex A for more information.
7.2 Fire protection from external fires — Consideration should be given to installation of a fire
detection system, according to ISO 9094, when batteries are installed in enclosed compartments. When
the batteries are installed in spaces susceptible to fire, considerations should be given to installing
batteries in containers that provide protection from an external fire.
7.3 Cell venting — Battery installations should be provided with guidance for battery compartment
ventilation directly to open air to avoid concentration of gasses if cell venting occurs. Consult with the
battery cell manufacturer for ventilation requirements for the battery/battery compartment.
When the battery banks are installed in an enclosed habitable space, the battery bank should be
installed in a (separate) container allowing for independent ventilation.