Controls For Ais - Furuno FAR-2218-BB Operator's Manual

4. AIS OPERATION
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.
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.
• ACQ: No function of AIS. Acquires selected target as a TT target.
• 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).
4-2
BRILL BRILL A/C RAIN A/C RAIN A/C SEA A/C SEA
OFF OFF ON ON
1 1 2 2
EBL EBL HL HL EBL EBL
OFF OFF OFFSET OFFSET
4 4 5 5
F1 F1 F2 F2 OFF OFF CU/TM CU/TM
CENTER CENTER RESET RESET
7 7 8 8
F3 F3 F4 F4 VECTOR VECTOR VECTOR VECTOR
TIME TIME MODE MODE
0 0
ALARM ALARM STBY STBY
CANCEL CANCEL
ACK ACK TX TX TRAILS TRAILS
BRILL BRILL
GAIN GAIN
OFF OFF ON ON
3 3
VRM VRM
MODE MODE
6 6
INDEX INDEX MENU MENU ACQ
LINE LINE
+ +
9 9
TARGET
TARGET TARGET
DATA
LIST LIST
RANGE RANGE
TARGET
ENTER ENTER
CANCEL
MARK MARK
TT/AIS keys