5. OPERATION 
OF ARPA
UsingARPA 
..................5-1
5.1 tNtTAL 
SETTING 
......................5-2
I 
Sefting Collision 
Decision Criteria : SAFE 
LIMIT 
.....................5-2
I 
Automatic 
Setting 
Mode 
(System 
Start) 
.................54
I 
Setting Range 
Scale : RANGE SCALE 
....................54
I  Setting Own 
Ship's Speed 
......................5-5
5.2 
DISPLAY 
MODE 
SETTING
I 
Setting Motion 
Display 
Mode 
ffM/RMI
I 
Setting Bearing 
Display Mode 
IAZIMODE] 
............5-7
5.3 TARGET 
ID No. 
DISPLAY 
........5€
5.4 
TARGETACQUTSTTION 
.......... 
....................5-9
I 
Automatic Acquisition 
[AUTO]
I 
ManualAcquisition 
[MANUAL] 
...........5-12
I 
Use 
of 
Automatic 
and Manual
Acquisition 
Modes 
[ACQ 
AUTO] 
IACO 
MANUAL] ................5-1 2
5.5 ARPA 
DATA DISPLAY 
............5.13
I 
Display 
of Vectors 
...............5-13
I 
Display 
of 
Past 
Positions 
[PAST 
POSN] 
...............5-16
5.6 DATA 
DISPLAY 
....5.18
I 
Types 
of Data 
Display  ........5-18
I 
MethodofDisplayingTargetData[tGTDATA] 
...5-19
I 
Cancellation 
of 
Displaying Target Data 
[tGT 
DATAI .............5-19
s.7ALARM 
D|SPL.AY 
....................5-20
I 
Dangerous 
TargetAlarm: 
CPA/TGPA ...........  .........5-20
I 
Guard Zone 
Alarm 
[GUARD 
ZONEI 
....5-21
I 
Lost TargetAlarm 
[LOST 
TARGETI  ....5-22
I  System Function 
Alarm 
IARPA 
(DATA) 
I 
.................................5-23
I 
Gyro Set Alarm 
[SET 
GYRO] 
...............5-23
5.8 
TRIAL MANEUVERING 
.........5.24
I  Trial Maneuvering 
in 
the 
True Vector Mode  ..........5-24
I 
Trial 
Maneuvering 
in 
the 
Relative Vector 
Mode  ...5-25
I 
Using 
the 
TRIAL 
Function  ....................5-26
5.9 
DELETING 
UNWANTED 
TARGETS  ........5.27
I 
Defeting Targets 
..................5-27
5.10 
ARPASETTTNG 
....................5-29
I 
Simulation ........... 
.................5-30