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5. AIS Operation
5-2
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 non-active.
An indication of AIS target display capacity limit is given well before it is reached. When 95% of user set limit is
reached for displayed AIS targets, the alert "636 AIS display 95% full" appears. When user set limit is reached, the
alert "637 AIS display 100% full" appears.
An indication of AIS target processing capacity limit is given well before it is reached. The alert "638 AIS storage
95% full" will be given when 95% of 1,500 targets are in storage buffer and the alert "639 AIS storage 100% full"
will be given when 1,500 targets or more are in storage buffer.
Chart Radar generates AIS-related alerts and these are "Alert 632: AIS dangerous target" and "Alert 633: AIS lost
target". Only active AIS targets generate alerts. The operator can enable or disable 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. The Chart Radar further eases the task of the operator by automatically changing non-active targets to
active targets, if they meet the dangerous target limits set by CPA and TCPA.
5.1 Controls for AIS
Control unit
The AIS uses the keys shown below.
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
MARK
ENTER
TIME
VECTOR
78
CANCEL
TRAILS
0
MODE
VECTOR
BRILL
BRILL
EBL
F1
OFF
F2
ON
ACK
ALARM
F3 F4
STBY
TX
ACQ: Manually acquires a target.
TARGET DATA: Displays data on TT selected
with trackball.
TARGET CANCEL: Terminates tracking of TT
selected with trackball.
Control unit RCU-020
Trackball
With the cursor inside the effective display area, you can access AIS functions by spinning the scrollwheel or
choosing appropriate AIS function from the CURSOR menu.
Spin the scrollwheel to show the following indications in the guidance area to access respective AIS function:
Tgt Acquire: Activates selected AIS target; displays target data for AIS target selected with the trackball.
Tgt Cancel /L = All: Sleeps selected AIS target.