6-83  Section 6    Target Tracking and AIS 
 
 
 
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6.14.3 AIS List 
 
 
Item  Description 
ID  ID No. of AIS 
CPA  Closest approach distance 
TCPA  Time up to closest approach distance 
COG or CTW 
COG: Course Over the Ground 
CTW: Course Through Water 
*In ground mode, COG is displayed. In water mode, CTW is displayed. 
*Operates in fixed ground mode on the ECDIS screen. 
SOG or STW 
SOG: Speed Over the Ground 
STW: Speed Through Water 
*In ground mode, SOG is displayed. In water mode, STW is displayed. 
*Operates in fixed ground mode on the ECDIS screen. 
Name  Ship name 
Call Sign  Call sign 
MMSI  Maritime Mobile Service Identity 
Source  AIS information source 
- Direct 
- Repeated 
- VTS 
BCR  Bow crossing distance 
BCT  Bow crossing time 
 
When [CTW/STW/Name/Call Sign/MMSI/Source] is clicked, CTW, STW, Name, Call Sign, 
MMSI, and Source are displayed in the rows of list.
 
When [BCR/BCT/BRG/RNG/HDG/POSN/Status] is clicked, BCR, BCT, Bearing, Range, 
Heading, Lat, Lon, and Status are displayed in the row of list.
 
 
Display Example