Policy on Intellectual Property Right (IPR)
Annex 1 Operational characteristics
1 Type of messages and files
2 Broadcast modes
2.1 General broadcast
2.2 Selective broadcast
2.3 Dedicated message
3 Broadcast priority
Annex 2 System architecture
1 The broadcast chain
1.1 System of information and management
1.1.1 File multiplexer
1.1.2 File multiplexer manager
1.1.3 Shore transmitter manager
1.2 Shore network
1.3 Shore transmitter description
1.3.1 Shore system architecture
1.3.2 Controller
1.3.3 Modulator
1.3.4 500 kHz RF generator
1.3.5 RF power amplifier
1.3.6 Transmit antenna with matching unit
1.3.7 Global navigation satellite receiver and a backup
atomic reference clock
1.3.8 Monitoring receiver
1.4 Transmission channel: Radio coverage estimation
1.4.1 Propagation channel
Annex 3 NAVDAT technical characteristics
1 Modulation principle
1.1 Introduction
1.2 Principle
1.3 Orthogonal frequency division multiplexing parameters
1.4 Channel bandwidth
1.5 Modulation
1.6 Synchronization
1.7 Energy dispersal
1.8 Spectral occupancy of RF signal
1.9 Sequence for receiving scanning possibility
2 Estimated usable data rate
3 NAVDAT transmitter performance specification
4 NAVDAT ship receiver
4.1 NAVDAT ship receiver description
4.1.1 Receiving antenna and global navigation satellite
system antenna
4.1.2 RF front end
4.1.3 Demodulator
4.1.4 File demultiplexer
4.1.5 Controller
4.1.6 Control and display unit
4.1.7 Data interface
4.1.8 Power supply
4.1.9 Receiver ID
4.1.10 Stored tables
4.1.11 Storage
4.1.12 Alert
4.1.13 Test facilities
4.1.14 Updates
4.1.15 Scan function
5 Minimum NAVDAT ship receiver performance specifications
Annex 4 Transmission structure
1 Frame structure
2 Synchronization head
3 Modulation information stream
3.1 Structure
3.2 Encoding
4 Transmitter information stream
4.1 Structure
4.2 Encoding
4.3 Position
5 Data stream
5.1 Structure
5.2 Encoding
6 Low-density parity-check codes
7 Cyclic redundancy check
Annex 5 Message file structure
Annex 6 Single frequency network for simultaneous broadcasting from multiple
NAVDAT locations (taken from Digital Radio Mondiale)
1 Explanation of Digital Radio Mondiale
1.1 Single frequency network operating mode
Annex 7 NAVDAT subject message codes
Annex 8 Implementation of NAVDAT shore infrastructure
A8.1 Purpose of this Annex
A8.2 Antenna characteristics of radio towers of various heights
A8.3 Antenna requirements for NAVTEX and NAVDAT systems
A8.4 NAVDAT estimated data rates for various transmission modes