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Appendices | RS90 Operating Manual
The RS90 VHF radio includes an AIS receiver-only function.
AIS Static and dynamic information
Defined transmit rates for Class A vessels shown below are provided
for reference purposes only. The frequency of messages received
vary due to a number of factors including but not limited to such
factors as antenna height, gain and signal interference.
Static information is either broadcast every 6 minutes, when data
has been amended, or upon request.
Dynamic information is broadcast depending on speed and course
alteration based on the following tables:
Ship’s dynamic conditions Normal reporting interval
At anchor or moored 3 Minutes
0-14 knots 10 Seconds
0-14 knots and changing course 3 1/3 Seconds
14-23 knots 6 Seconds
14-23 knots and changing course 2 Seconds
Ship faster than 23 knots 2 Seconds
Ship faster than 23 knots and changing course 2 Seconds
Platform’s condition Normal reporting interval
Class B Shipborne mobile equipment not moving faster than 2 Knots 3 Minutes
Class B Shipbome mobile equipment moving 2-14 Knots 30 Seconds
Class B Shipbome mobile equipment moving 14-23 Knots 15 Seconds
Class B Shipbome mobile equipment moving faster than 23 Knots 5 Seconds
Search and Rescue aircraft (airborne mobile equipment) 10 Seconds
Aids to Navigation 3 Minutes
AIS transceiver 10 Seconds
Source of information for above table 1-1, 1-2: (ITU
recommendations technical document: ITU-R M.1371-1)