RA83/84/85/93/94/95 Series
Chapter 6
Using The Menu
Operation Manual
6.6 Operation of the EPA
The EPA (Electronic Plotting Aid) provides the information for collision avoidance by
manually plotting the first and second positions of each target. These include:
CPA (Closest Point of Approach), TCPA (Time to Closest Point of Approach), Ship’s
speed, Ship’s course and Ship’s vector
6.6.1 Using the EPA
Perform the following procedure to use the EPA function:
(1) Move the Joystick to move the cross cursor to a target for plotting.
(2) Press the ACQ key to acquire the target. The assigned target is braced with a
dashed acquire mark with the figure 1 shown nearby.
(3) After 30 seconds or more since the target has been acquired, plot the target again
as a second plot by placing the cross cursor on it and pressing the ACQ key. A
vector will be developed and the relevant data will be shown on the right side of the
screen. (Refer to Figure 6.2)
(4) Press the DELETE key to cancel the target tracking. The symbol of the target and
data will be cleared.
1
0
12 NM
090
HDG045
.
2゜
054
.
9゜
SOG
20
.
4KT
MAN
DRIFT
20
.
3KT
SET
083
.
6゜
VRM
TRUE
PI
115.
0゜
PI
0.
025NM
EBL
>230.
0゜
263.
0゜
>0.
053NM
0.
093NM
TRUE
2 NM
H UP
RM
(R)
TUNE
AUTO
GAIN
SEA
RAIN
MAN
AUTO
AUTO
COG
LAT
LON
RNG
T BRG
WP RT01 DGPS
LAT
LON
R02
.
345 NM
CURSOR
TARGET
XTE
AGE
CPA
TCPA
COG
T BRG
RNG
SOG
3
.
0 MIN
2
.
6 NM
5
.
3 MIN
126
.
8 ゜
21
.
7 KT
338
.
4 ゜
13
.
7 NM
VECT
3 MIN
BRG
090
.
0 °
ID
TARGET ID
COG
SOG
21
.
7 KT
CPA
TCPA
4
.
3 NM
12
.
6 MIN
100
110
120
130
140
150
160
170
080
070
060
050
040
030
020
010
270
260
250
240
230
220
210
280
290
300
310
190
200
320
330
340
350
000
180
MAN
LIM
CPA
TCPA
0
.
5 NM
5
.
3 MIN
EPA DATA
338
.
0 ゜
338
.
0゜
13
.
7NM
X−BAND
LP
IR1
ENH
TRAILS
12 MIN
O
FFSET
BZ OFF
O
FF SENT
PM
02
01
UNRELIABLE
12
MMSI 431023652
PLOT DATA
AIS DATA
DISP LIM 3
.
0 NM
POSITION
NO VALID SENSOR
RADAR
DISP
ADJUST SYSTEM
GYRO
GND
STAB
35゜38632N
139゜06
.
352E
SPD
20
.
4KT
LOG
STAB
MAN
TRUE
OWN SHIP DGPS
LAT
LON
35゜38632N
139゜06
.
352E
35゜38632N
139゜06
.
352E
RADAR
DEPTH
TEMP
156
.
4 M
13
.
4
℃
DISP
ADJUST SYSTEM
WIDTH 090
.
0 °
RNG
9
.
0NM
DEPTH
3
.
2NM
ALARM
AIS ON
MAP N
o
1
VAV ALIGN
OS PAST POSN
HDG 045
.
2゜
054
.
9゜
SOG
20
.
4KT
MAN
DRIFT
20
.
3KT
SET
083
.
6゜
COG
LAT
LON
RNG
T BRG
WP RT01 DGPS
LAT
LON
R02
.
345 NM
CURSOR
TARGET
XTE
CPA
TCPA
COG
T BRG
RNG
SOG
2
.
6 NM
5
.
3 MIN
126
.
8 ゜
21
.
7 KT
338
.
4 ゜
13
.
7 NM
VECT
3 MIN
ID
TARGET ID
COG
SOG
21
.
7 KT
CPA
TCPA
4
.
3 NM
12
.
6 MIN
MAN
LIM
CPA
TCPA
0
.
5 NM
5
.
3 MIN
ATA DATA
338
.
0 ゜
338
.
0゜
13
.
7NM
02
01
UNRELIABLE
MMSI 431023652
PLOT DATA
AIS DATA
DISP LIM 3
.
0 NM
POSITION
NO VALID SENSOR
GYRO
GND
35゜38632N
139゜06
.
352E
SPD
20
.
4KT
LOG
MAN
TRUE
OWN SHIP DGPS
LAT
LON
35゜38632N
139゜06
.
352E
35゜38632N
139゜06
.
352E
DEPTH
TEMP
156
.
4 M
13
.
4
℃
STAB
STAB
Figure 6.3 The EPA data shown on the screen
93142105-02
6-23