Icom MR-1220 Instruction Manual - Page 32

5 AIS RECEIVER AIS operation DDAbout Lost targets After a specified period of time (see the table below) has elapsed since the last AIS was received from a vessel, it is considered a Lost Target. The "Lost target" icon automatically disappears from the screen 6 minutes and 40 seconds after the vessel becomes "Lost target." Reference time to become a Lost target •• Class A/B Vessel type Nominal reporting interval Class A Class A 1 Class B Vessel is at anchor or moored and not moving faster than 3 knots Vessel is not moving faster than 2 knots 2 Vessel is at anchor or moored and moving faster than 3 knot Class A 3 Class B Vessel is moving between 0 and 14 knots Vessel is moving between 2 and 14 knots Class A 4 Class B Vessel is moving between 0 and 14 knots while changing course Vessel is moving between 2 and 14 knots while changing course 5 Vessel is moving between 14 and 23 knots 6 Vessel is moving between 14 and 23 knots while changing course 7 Vessel is moving faster than 23 knots 8 Vessel is moving faster than 23 knots while changing course 3 min. - 10 sec. 10 sec. - 3 1⁄3 sec. - 6 sec. 2 sec. 2 sec. 2 sec. Lost target maximum interval Class A 18 min. - 60 sec. 60 sec. - 60 sec. - 36 sec. 36 sec. 30 sec. 30 sec. Nominal reporting interval Class B *1 CS *2 SO *3 - - 3 min. 3 min. N/A - - 30 sec. 30 sec. - - 30 sec. 30 sec. 30 sec. 30 sec. 30 sec. 30 sec. 15 sec. 15 sec. 5 sec. 5 sec. *1 AIS Class B does not provide information about the navigation status, anchored or moored. *2 CS: Carrier-sense, *3 SO: Self organized Lost target maximum interval Class B *1 CS *2 SO *3 - - 18 min. 18 min. N/A - - 180 sec. 180 sec. - - 180 sec. 180 sec. 180 sec. 180 sec. 180 sec. 180 sec. 90 sec. 90 sec. 30 sec. 30 sec. •• Others Category SAR aircraft Base station AtoN Nominal reporting interval 10 sec. 10 sec. 3 min. Lost target maximum interval 60 sec. 60 sec. 18 min. 27