This International Standard specifies installation guidelines for ship communication networks for improving communication for shipboard equipment and systems that are independent from navigational equipment networks and engine-control networks. This International Standard utilizes existing standards relating to protocols, and provides new guidelines for such aspects as communication network-system architecture, administration, operation, and installation. The new guidelines specifically include: redundancy if necessary for a shipboard communication network system; network administration that does not require experts; physical as well as logical security; and network installation.