Section 6    Target Tracking and AIS  6-88 
 
Displayed information  Explanation 
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/HP/MP) 
X2 Category Y(DG/HP/MP) 
X3 Category Z(DG/HP/MP) 
X4 Category OS(DG/HP/MP) 
X9 No Additional Information 
X0 All Ships of This Type 
Bearing  Displays the bearing of an AIS target. 
Range  Displays the distance to an AIS target. 
COG or CTW  Displays the course of an AIS target. Displayed as "COG" in the course 
over the ground mode and "CTW" 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. 
Heading  Displays the heading of an AIS target. 
ROT  Displays the turning speed of an AIS target. 
Position  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 
displayed. 
Position Sensor  Displays the type of the position sensor used by an AIS target. 
0: Not Defined 
1: GPS 
2: GLONASS 
3: Combined GPS/GLONASS 
4: Loran-C 
5: Chayka 
6: Integrated Navigation System 
7: Surveyed 
8: Galileo 
15: Internal GNSS 
Source  AIS information source 
- Direct 
- Repeated 
- VTS