31
Class B systems
Ships Dynamic Conditions
Reporting rate (nominal)
SOTMDA – 0 to 2 knots
3 Minutes
SOTMDA – 2 to 14 knots
30 Seconds
SOTMDA – 14 to 23 knots
15 Seconds
SOTMDA – Greater than 23 knots
5 Seconds
CSTMDA – 0 to 2 knots
3 Minutes
CSTMDA – Greater than 2 knots
30 Seconds
Other AIS sources
Source
Reporting rate
Search and Rescue (SAR) aircraft
10 Seconds
Aids to navigation (AToN)
3 Minutes
AIS base station
10 Seconds or 3.33 Seconds, depending on
operating parameters
Summary of Contents for AIS
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