7.2.2.1 The public address system shall be a loudspeaker
installation enabling the broadcast or messages into all spaces where
crew members or passengers, or both, are normally present, and to
muster stations. It shall allow for the broadcast of messages from
the navigation bridge and such other places on board the ship as the
Administration deems necessary. It shall be installed with regard
to acoustically marginal conditions and not require any action from
the addressee. It shall be protected against unauthorized use.
7.2.2.2 With the ship underway in normal conditions,
the minimum sound pressure levels for broadcasting emergency announcements
shall be: