Furuno FAR-2238 User Manual

4. AIS OPERATION
4-2
4.1 Controls for AIS
The control unit has three keys that are used in the AIS mode. The keys are indicated
in the figure below.
• TARGET DATA: Shows the selected target’s data in the information box. If the tar-
get is sleeping, activates the target.
• TARGET CANCEL: Sleeps the cursor-selected target.
These functions, along with other AIS functions, can also be accessed from the [CUR-
SOR] menu (See section 1.7).
There can be several hundreds or several thousands of AIS targets, and of those only
a few will be significant for your ship. To remove unnecessary AIS targets from the radar
display, the feature "active and sleeping AIS targets" is available. Initially any new AIS
target received by an AIS transponder is not active (="sleeping"). Such sleeping targets
are shown with a small triangle. The operator can pick any AIS target and change it from
sleeping to active. Active AIS targets are shown with a large triangle with speed vector,
headline, ROT indicator, etc. Further, the operator can pick active AIS targets and
change their status to sleeping.
An indication of AIS target activated capacity limit is given well before it is reached.
When 95% of 50 targets are activated, the Alert "ACTIVE AIS 95%" appears. When 50
targets are activated, the Alert "ACTIVE AIS FULL" appears. Sleep any unnecessary
AIS targets to allow acquisition of new targets.
An indication of AIS target display capacity limit is given well before it is reached. When
95% of 350 targets are displayed, the Alert "AIS DISPLAY 95%" appears. When 350
targets are displayed, the Alert "AIS DISPLAY FULL" appears.
An indication of AIS target processing capacity limit is given well before it is reached.
The Alert "AIS CAPACITY FULL" appears when 1,200 targets are in the storage buffer.
When capacity-related AIS alerts occur, you can reduce the number of AIS targets to
display from [AIS DISP FILTER] in the [AIS] menu. See section 4.5.
This radar generates AIS-related alerts. These are Alert "AIS DANGER OF COLLI-
SION" and Alert "AIS TARGET LOST". Only active AIS targets generate alerts. The op-
erator can activate or sleep AIS target alerts as desired. The feature "active and
sleeping AIS targets" is very effective for focusing on only those AIS targets that need
supervision. This radar further eases the task of the operator by automatically changing
non-active targets to active targets, if their CPA and TCPA are within a preset limit.
ACQ
ON
MENU
OFF
VRM
A/C SEAA/C RAIN
MODE
3
LINE
INDEX
6
OFF
21
HL
CENTER
OFF
45
RESET
CU/TM
OFFSET
EBL
GAIN
TARGET
CANCEL
TARGET
DATA
RANGE
-
+
LIST
TARGET
9
ENTER
MARK
TIME
VECTOR
78
CANCEL
TRAILS
0
MODE
VECTOR
BRILL
BRILL
EBL
F1
OFF
F2
ON
ACK
ALARM
F3 F4
STBY
TX
AC
Q
ON
MENU
O
F
F
VRM
A/C
S
E
A
A/C RAIN
M
OD
E
3
L
INE
INDEX
6
O
F
F
2
1
HL
C
ENTER
OF
F
4
5
R
E
S
ET
C
U
/T
M
O
FF
S
E
T
EBL
G
AIN
RANGE
-
+
LI
ST
TARGE
T
9
E
NTE
R
MARK
T
IM
E
VECTO
R
7
8
C
AN
C
EL
TRAIL
S
0
M
O
DE
VECTO
R
BRI
L
L
BRILL
EB
L
F1
O
F
F
F2
O
N
A
CK
ALARM
F
3
F
4
S
TB
Y
T
X
AIS keys

Furuno FAR-2238 Specifications

General

Brand	Furuno
Model	FAR-2238
Category	Marine Radar
Language	English