CONTENTS
Annex
1 - General purpose equipment characteristics
1 General
2 Technical format of a call sequence
3 Dot pattern and phasing
4 Format specifier
5 Address
6 Category
7 Self-identification
8 Messages
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
3 Class B (MF and/or VHF only)
3.1 Transmit
capabilities
3.2 Receive
capabilities
4 Class D (VHF only)
4.1 Transmit
capabilities
4.2 Receive
capabilities
5 Class E (MF and/or HF only)
5.1 Transmit
capabilities
5.2 Receive
capabilities
Annex
3 - User interface for operation of shipborne equipment
1 General
2 Definitions
3 Controls
4 Display of messages in plain language
5 Transmission of DSC messages
5.1 DSC message composition
features
5.2 Operational guidance to
the operator
5.3 Defaults
5.4 Other items
Annex
4 - Automated procedures in shipborne equipment
1 General
2 Definitions
3 Tasks of automated procedures
3.1 Tasks common to all
automated procedures handling DSC messages
3.1.1 Handling alarms
3.1.2 Displaying stages of the
automated procedure
3.1.3 Tuning the radio
3.1.4 Displaying operator
options
3.1.5 Handling DSC messages not
pertinent to the active procedure
3.1.6 Displaying warnings
3.1.7 Handling DSC messages
containing errors
3.1.8 Transmission of DSC
messages
3.1.9 Automated termination
3.2 Tasks specific to certain automated
procedures
3.2.1 Tasks of automated
procedures initiated by receiving non‑distress DSC messages
3.2.2 Tasks of automated
procedures initiated by sending a non‑distress DSC message
3.2.3 Tasks of automated
procedures initiated by receiving a distress DSC message or sending a distress
relay on behalf of someone else
3.2.4 Tasks of automated
procedures initiated by sending a distress alert attempt
3.2.5 Radiotelephone
communications automated procedure
3.2.6 Other non-DSC automated
procedures
3.3 Tasks concerning multiple
automated procedures
3.3.1 Number of simultaneous
automated procedures
3.3.2 Sending distress automated
procedure
3.3.3 Operator optionsp
3.3.4 Unacknowledged poll, test,
or position request automated procedures received on hold
3.4 Warnings