Recommendation ITU-R M.541-11
Policy on Intellectual Property Right (IPR)
Annex 1 Operational procedures for distress, urgency and safety calls
A1-1 Introduction
A1-1.1 Method of calling
A1-2 Digital selective calling distress alert
A1-3 Procedures for digital selective calling distress alerts
A1-3.1 Transmission by a mobile unit in distress
A1-3.1.3 Distress alert attempt
A1-3.1.4 Distress
A1-3.2 Reception
A1-3.3 Acknowledgement of distress alerts
A1-3.4 Distress alert relays
A1-4 Procedures for digital selective calling urgency and safety calls
A1-5 Testing the equipment used for distress and safety calls
Annex 2 Operational procedures for routine calls
A2-1 Frequency/channels
A2-1.2 International calling
A2-1.3 National calling
A2-1.4 Method of calling
A2-2 Operating procedures
A2-2.1 Coast station initiates call to ship station (see Note 1)
A2-2.2 The following procedures apply at the ship stations:
A2-2.3 Ship station initiates call to coast station (see Note 1)
A2-2.4 Ship station initiates call to ship station
Annex 3 Operational procedures for ships for digital selective calling
communications on MF, HF and VHF
A3-1 Distress
A3-1.1 Transmission of digital selective calling distress alert
A3-1.2 Actions on receipt of a distress alert
A3-1.3 Distress traffic
A3-1.4 Transmission of a digital selective calling distress alert
relay
A3-1.4.1 Transmission of a digital selective calling
distress relay call on receipt of a digital selective calling distress alert
A3-1.4.2 Transmission of a digital selective calling
distress relay call on behalf of someone else
A3-1.5 Acknowledgement of a digital selective calling distress alert
relay received from a coast station
A3-1.6 Acknowledgement of a digital selective calling distress relay
call received from another ship
A3-1.7 Cancellation of an inadvertent digital selective calling
distress alert
A3-2 Urgency
A3-2.1 Transmission of urgency messages
Announcement:
Transmission of the urgency call and message:
A3-2.2 Reception of an urgency message
A3-3 Safety
A3-3.1 Transmission of safety messages
Announcement:
Transmission of the safety call and message:
A3-3.2 Reception of a safety message
A3-4 Public correspondence
A3-4.1 Digital selective calling channels for public correspondence
A3-4.1.1 VHF
A3-4.1.2 MF
A3-4.2 Transmission of a digital selective calling call for public
correspondence to a coast station or another ship
A3-4.3 Repeating a call
A3-4.4 Acknowledgement of a received call and preparation for
reception of the traffic
A3-4.5 Reception of acknowledgement and further actions
A3-5 Testing the equipment used for distress and safety
A3-6 Special conditions and procedures for digital selective calling
communication on HF
A3-6.1 Distress
A3-6.1.1 Transmission of digital selective calling
distress alert and choice of HF bands
A3-6.1.2 Preparation for the subsequent distress traffic
A3-6.1.3 Distress traffic
A3-6.1.4 Actions on reception of a digital selective
calling distress alert on HF from another ship
A3-6.1.5 Transmission of digital selective calling
distress alert relay
A3-6.1.6 Acknowledgement of a HF digital selective
calling distress alert relay received from a coast station
A3-6.2 Urgency
A3-6.2.1 Transmission of digital selective calling
announcement of an urgency message on HF
A3-6.2.2 Transmission of the urgency message and
subsequent action
A3-6.3 Safety
A3-6.3.1 Transmission of digital selective calling
announcement and safety messages on HF
A3-6.3.2 Reception of safety messages
Annex 4 Operational procedures for coast stations for digital selective
calling communications on MF, HF and VHF
A4-1 Distress (see Note 1)
A4-1.1 Reception of a digital selective calling distress alert
A4-1.2 Acknowledgement of a digital selective calling distress alert
A4-1.3 Transmission of a digital selective calling distress alert
relay
A4-1.4 Reception of a distress alert relay
A4-2 Urgency
A4-2.1 Transmission of a digital selective calling announcement
A4-3 Safety
A4-3.1 Transmission of a digital selective calling announcement
A4-4 Public correspondence
A4-4.1 Digital selective calling frequencies/channels for public
correspondence
A4-4.1.1 VHF
A4-4.1.2 MF
A4-4.2 Transmission of a digital selective calling from a coast
station call to a ship
A4-4.3 Repeating a call
A4-4.4 Preparation for exchange of traffic
A4-4.5 Acknowledgement of a received digital selective calling call
A4-5 Test calls using digital selective calling
A4-6 Special conditions and procedures for digital selective calling
communication on HF
A4-6.1 Distress
A4-6.1.1 Reception and acknowledgement of a digital
selective calling distress alert on HF
A4-6.1.2 Distress traffic
A4-6.1.3 Transmission of digital selective calling
distress alert relay on HF
A4-6.2 Safety
A4-6.2.1 Transmission of safety announcements and
messages on HF
Annex 5 Operational procedures for both ship and coast stations for automatic
connection system using digital selective calling communications on MF and HF
A5-1 Frequencies and method of calling for automatic connection system
A5-1.1 Frequencies for automatic connection system
A5-1.2 Method of calling
A5-2 Operating procedures
A5-2.1 Scanning
A5-2.2 Calling station
A5-2.3 Called station
A5-2.4 Frequency identification and following response to a calling
station
A5-2.4.1 Response to a coast station
A5-2.4.2 Response to a ship station
A5-2.5 Selection of working frequency
Annex 6 Autonomous maritime radio devices Group A man overboard devices using
VHF digital selective calling for alerting and automatic identification system
technology for tracking
A6-1 Digital selective calling alert
A6-2 Identification
A6-3 Position updating
A6-4 Acknowledgment
A6-5 Cancellation of an inadvertent distress alert
Annex 7 Frequencies used for digital selective calling