Ais Reporting Interval - Redningsselskapet/rs-weather GitHub Wiki

Update intervals for autonomous mode

Information	Messages	Frequency
Static or Vayage related	5.24	Every 6 min or, when data has been amended, on request.
Dynamic		See below
Safety		As required
Long Range	24	30 mins

Dynamic Class A

Ships dynamic conditions	Not changing Course	Changing Course
At anchor or moored and moving less than 3 knots	3 min	3 min
At anchor or moored and moving faster than 3 knots	10 secs	10 secs
0 to 14 knots	10 sec	3 1/3 secs
14 to 23 knots	6 secs	2 secs

If a mobile station determines it is the semaphore the reporting interval should decrease to 2 secs