Section 2 Name and Function of Each Unit  2-22 
Cargo Category  When the setting of the type of a ship is 
2X, 4X, 6X, 7X, 8X or 9X, the digit shown at the end of the code represents 
the cargo/condition. 
X1 Category X(DG/HS/MP) 
X2 Category Y(DG/HS/MP) 
X3 Category Z(DG/HS/MP) 
X4 Category OS(DG/HS/MP) 
X9 No Additional Information 
X0 All Ships of This Type 
Displays the bearing of an AIS target. 
Displays the distance to an AIS target. 
COG or CSE  Displays the course of an AIS target. Displayed as "COG" in the course 
over the ground mode and "CSE" in the course through the water mode. 
SOG or STW  Displays the ship speed of an AIS target. Displayed as "SOG" in the speed 
over the ground mode and "STW" in the speed through the water mode. 
Displays the closest approach distance to an AIS target. 
Displays the time to reach the closest approach point to an AIS target. 
Displays the bow crossing range of an AIS target. 
Displays the bow crossing time of an AIS target. 
Displays the heading of an AIS target. 
Displays the turning speed of an AIS target. 
Displays the position of an AIS target. 
Position Accuracy  When the position-fix accuracy of an AIS target is low, [>10m] is displayed. 
When the position-fix accuracy of an AIS target is high, [<10m] is 
Position Sensor  Displays the type of the position sensor used by an AIS target. 
0: Not Defined 
1: GPS 
2: GLONASS 
3: GPS/GLONASS 
4: Loran-C 
5: Chayka 
6: Integrated Navigation System 
7: Surveyed 
8: Galileo 
Status  Status of an AIS target 
• Sleeping 
• Activated 
• Lost 
•  Danger 
Source  AIS information source 
• Direct 
• Repeated