SECTION 5 
OPERATION OF 
ATA AND AIS
 
 
 
 
 
 
 
5.1  PREPARATION ............................................................ 5-2 
5.1.1  Collision Avoidance.................................................. 5-3 
5.1.2  Definitions of Symbols ............................................. 5-6 
5.1.3  Setting Collision Decision Criteria  
(CPA/TCPA Limit) ................................................................ 5-
8 
5.1.4  Setting Vectors (Vector Time) .................................. 5-9 
5.1.5    Setting CPA Ring (CPA Ring) ................................. 5-10 
5.1.6  Setting Automatic Acquisition Key Assignment         
(Set GZ Alarm Key) ............................................................5-
11 
5.2  ATA OPERATION ....................................................... 5-12 
5.2.1  Acquiring Target ..................................................... 5-12 
5.2.2  Canceling Unwanted Targets................................. 5-14 
5.2.3  Displaying Target ID No.  
(Target Number Display) .................................................. 5-
15 
5.2.4  ATA Data Display..................................................... 5-16 
5.2.5  Target Data Display................................................. 5-21 
5.2.6  Alarm Display .......................................................... 5-25 
5.2.7  ATA Simulation........................................................ 5-29 
5.2.8  Setting ATA Tracks (ATA Track Setting) ................ 5-35 
5.3  AIS OPERATION........................................................ 5-42 
5.3.1  Initial Setting ........................................................... 5-43 
5.3.2    Setting AIS Display Function (AIS Function) ....... 5-45 
5.3.3  Activating AIS Targets............................................. 5-46 
5.3.4  Deactivating AIS Targets......................................... 5-47 
5.3.5  Setting AIS Symbol Display Function  
(AIS Symbol Display) ........................................................ 5-
48 
5.3.6  Displaying Numeric Data of AIS Targets ............... 5-49 
5.3.7   Setting ATA Symbol Display Function  
(ATA Symbol Display) .......................................................5-
51 
5.3.8    Setting AIS Filter (AIS Filter Setting) ..................... 5-52 
5.3.9    Deciding AIS Target as the Same One   
(Identical Distance) ...........................................................5-
55 
5.3.10    Conditions for Deciding AIS Target to be Lost... 5-57 
5.3.11  Displaying AIS Symbols........................................ 5-58 
5.3.12  AIS Alarm Display.................................................. 5-59 
5.3.13  Restrictions............................................................ 5-60