3.1 The smoke extraction system should have a
minimum capacity as required by SOLAS regulation II-2/8.5footnote.
3.2 The smoke extraction system should be capable
of maintaining a negative pressure within the atriums with respect
to the pressure that may be found under normal operating conditions
in the surrounding spaces.
3.3 The smoke extraction system should be capable
of manual and automatic operation. The control panel should be located
in the central control station.
3.4 The automatic activation of the smoke extraction
system, by means of the smoke detectors, may be delayed for up to
2 min from the activation of the first detector, if not acknowledged.
This 2 minute delay is intended to allow for crew verification of
the smoke detector alarm.