Pubic Address System is application for all kinds of vessels,offshore,port,company and schools, as a equipment for command communication,shot out, General Alarm and entertainment etc.
The public address system shall be a loudspeaker installation enabling the broadcast of 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.
With the ship underway in normal conditions, the minimum sound pressure levels for broadcasting emergency announcements shall be:
1. in interior spaces 75 dB (A) and at least 20 dB (A) above the speech interference level;
2. in exterior spaces 80 dB (A) and at least 15 dB (A) above the speech interference level.