Policy on Intellectual
Property Right (IPR)
RECOMMENDATION ITU-R M.493-13
Digital selective-calling system for use in the maritime mobile service
Scope
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
Example:
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
Annex 3 Design example User interface for simplified
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 Design example Automated procedures for simplified
operation 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 options
3.3.4 Unacknowledged
poll, test, or position request automated procedures received on hold
3.4
Warnings