Simrad AI80 User Manual page 13

Data reporting and transmission rates
AIS data as stated above are autonomously sent at different update
rates and thus reporting rates are dependent on the ship's navigational
mode. Dynamic information is dependent on speed and course
alteration while static and voyage related data are transmitted every 6
minutes or on request. Thus fast ferries will report their navigational
data at a higher update rate than ships at anchor.
Ship at anchor
Ship 0 to 14 knots
Ship 0 to 14 knots and changing course
Ship 14 to 23 knots
Ship 14 to 23 knots and changing course
Ship > 23 knots
Ship > 23 knots and changing course
Man_user_AI80_r2
Ship's Manoeuvring Condition
System overview
Nominal Reporting Interval
3 min.
10 sec.
3 1/3 sec.
6 sec.
2 sec.
2 sec.
2 sec.
3