7.13.1 Public spaces and service spaces, crew
accommodation areas where sleeping berths are provided, storage rooms
other than those containing flammable liquids, and similar spaces
shall be protected by a fixed sprinkler system based on the standards
developed by the Organization.footnoteA stairway
open at one deck shall be considered part of the space to which it
is open and consequently shall be protected by any sprinkler system
provided for that space. Manually operated sprinkler systems shall
be divided into sections of appropriate size and the valves for each
section, start of sprinkler pump(s) and alarms shall be capable of
being operated from two spaces separated as widely as possible, one
of which shall be a continuously manned control station. In category
B craft, no section of the system shall serve more than one of the
zones required in 7.11.
7.13.2 Plans of the system shall be displayed
at each operating station. Suitable arrangements shall be made for
the drainage of water discharged when the system is activated.
7.13.3 Category A craft need not comply with the
requirements of 7.13.1 and 7.13.2 providing that:
- smoking is not permitted;
- sales shops, galleys, service spaces, ro-ro spaces and cargo spaces
are not fitted;
- the maximum number of passengers carried does not exceed 200;
and
- the voyage duration at 90% of maximum speed from departure port
to destination when fully laden does not exceed 2 hours.