CONTENTS

 1     General
        1.2     References
 2     Available services
 3     System configuration
        3.1     Space segment
        3.2     Earth facilities
                  3.2.1     Land Earth Station (LES)
                  3.2.2     Ship or land mobile earth station (SES)
                  3.2.3     Network Coordinating Station (NCS)
        3.3     General maintenance principles
                  3.3.1     Responsibilities
                  3.3.2     Available services
        3.4     Lining-up and maintaining international public switched telex and data circuits
        3.5     Lining-up and maintaining satellite circuits
                  3.5.1     Control, sub-control stations and respective responsibilities
                  3.5.2     Transmission characteristics
 4     Maintenance organization for the Inmarsat-C maritime satellite
        4.1     Maintenance organization as applicable to Inmarsat
                  4.1.1     Ship Earth Station (SES) maintenance responsibility
                  4.1.2     Land Earth station (LES) maintenance responsibility
                  4.1.3     Network Coordination Station (NCS) maintenance responsibility
                  4.1.4     Network Operations Centre (NOC) maintenance responsibility