This document describes operational and performance requirements, methods of testing and required test results for components of Public-Address-Systems (PA), General-Emergency Alarm Systems (GA) and Public-Address General- Emergency Alarm Systems (PAGA) for marine applications (ships) in support of the requirements of IMO for such systems, while it is up to the manufacturer to define the components to be type approved together or separately, to build up a system. NOTE 1 This part of the document does not include system engineering for installation on board nor installation requirements. This document refers as much as possible to relevant established standards. Where relevant standards do not exist or are not precise enough, this document will describe additionally own operational and performance requirements, methods of testing and required test results. NOTE 2 All text of this document, whose wording is identical to that of IMO circular MSC.808 or to SOLAS convention requirements, is printed in italics, and the resolution and associated paragraph numbers are indicated in brackets.