Icom MR-1220 Series Instruction Manual page 36

6
ThE sIMPLIFIED ARPA OPERATION
ARPA operation
D ARPA target status
ARPA targets are displayed with icons. The icon
vary, depending on the target type or its status.
Icon
Focused target
Displayed with the orange colored circle
selected target
Displayed with corners of the square
selected, started to acquire automatically or
manually.
Acquired target
Approximately 1 minute after the acquirement
is started, the dotted circle icon changes
to a circle, and the vector of the vessel is
displayed.
Target with a number
Displayed when the "Display Target Number"
5
setting in the ARPA menu is set to "selected
Targets" or "All".
CPA/TCPA alarm mark.
The target is close to within a minimum range
and time.
• An alarm sounds and red colored mark
blinks until acquiring the target.
Push [CLEAR]/[
Push [ACQ]/[
Lost target
Indicates the tracking of a target is lost.
• An alarm sounds, red cross blinks, and
"Lost an ARPA target" is displayed.
Push [CLEAR]/[
31
Status
] to cancel the alarm.
] to acquire the target.
] to cancel the alarm.
D Course and speed vector
The vector indicates the target's predicted, true or
relative course and speed.
• The vector time may change, depending on the
setting in the "Vector Time" item of the Target menu
(p. 39).
• The tip of the vector shows the target's predicted
position after the time selected in the "Vector Time"
item of the Target menu (p. 39).
Target's predicted
positon
Vector
Vector time
Current position
D Plots (ARPA)
The plot displays the target's past positions as 5 dots,
during each specified tracking interval.
L The target track interval may change, depending on the
setting in the "Track Interval" item of the Target menu.
(p. 39)
Plots
Going straight
Turning right
Decelerating (dots are closer
together behind the target)
Accelerating (dots are father apart
behind the target)
Status