CONTENTS

Annex 1  General purpose equipment characteristics
 1     General
 2     Technical format of a call sequence
 3     Dot pattern and phasing
                  3.4.1     200 bits
                  3.4.2     20 bits
 4     Format specifier
 5     Address
 6     Category
 7     Self-identification
 8     Messages
        8.5     Test calls
 9     End of sequence
10     Error-check character
11     Distress alert attempt
12     Shipborne human machine interface (HMI)
       12.1     Shipborne aural alarm
       12.2     Inactivity timer
       12.3     Display
       12.4     MMSI
       12.5     Disabling of DSC automatic channel switching function on VHF
       12.6     Data interface
       12.7     Position updating
       12.8     Geographic area entry
       12.9     Medical transport and neutral ships and aircraft
Annex 2  Equipment classes
 1     Equipment classes only apply to shipborne equipment
 2     Class requirements for B, D and E are given in § 3, 4 and 5 (See Tables 4.1 to 4.10.2 for technical requirements)
 3     Class B (MF and/or VHF only)
        3.1     Transmit capabilities
                  3.1.5     Messages
        3.2     Receive capabilities
 4     Class D (VHF only)
        4.1     Transmit capabilities
                  4.1.5     Messages
        4.2     Receive capabilities
 5     Class E (MF and/or HF only)
        5.1     Transmit capabilities
                  5.1.5     Messages
        5.2     Receive capabilities