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19
6
ATA/AIS
TARGET MENU
VECT MODE
VECT TIME
CPA LIMIT
TCPA LIMIT
TRUE
REL
6M
1.0NM
1 M
TARGET TRACK
1 M
D
TARGET menu
Select the TARGET menu, then set the item.
VECT MODE
Select the vector type.
• TRUE (True vector):
The predicted true motion of a target as the result of your
own ship’s direction and speed input.
• REL (Relative vector):
The predicted movement of a target relative to your own
ship.
VECT TIME
Set the vector length (time) to 15 seconds, 30 sec-
onds or 1 to 15 minutes.
CPA* LIMIT
Set the CPA limit distance.
TCPA* LIMIT
Set the TCPA limit time.
• An ATA or AIS alarm sounds when the CPA and TCPA
reach the limit.
TARGET TRACK
The track data is updated at this specified tracking
interval. Select the track interval time between OFF,
15 seconds, 30 seconds and 1 to 15 minutes.
After 5 dots are displayed, the oldest dot disappears
at the time when the next dot appears.
■
ATA operation
Select a target on the screen which you want to track.
Identification No.
Bearing
Course Distance Speed
Passage of time
Closest Point of
Approach
Time to Closest
Point of Approach
ATA
ATA
No.
q
Push [
p
], [
q
], [
t
] or [
u
] to move the “+” cursor onto
a desired target.
w
Hold down [TARGET]/[
] for 1 second to select
the target for tracking.
• A dotted square symbol appears on the cursor.
• The target identification number, bearing, distance read
-
out, course (CSE), speed (SPD), CPA and TCPA appear
in the information screen.
• The timer starts to count the progressing time.
• After 20 seconds progressing time has passed, the vec
-
tor appears on the target.
• After 1 minute progressing time has passed, it changes
to a solid circle with a vector line, and tracking operation
starts.
• When the target disappears, it changes to a blinked loz
-
enge. And then the mark disappears after 1 minute.
• When a target advances within the CPA and TCPA limits,
a mark changes to a triangle, blinks and sounds an alarm.
The alarm will be cancelled if any key is pushed.
• To cancel the target setting, move the cursor onto the
target, then hold down [TARGET]/[
] for 1 second.
• [TARGET]/[
] is pushed for changing the display of
EBL/VRM etc. to target information.
• To select the target which displays information, set the
cursor to the target, and then push [TARGET]/[
].
■
ATA settings (Continued)
* CPA/TCPA: Closest Point of Approach and Time to
Closest Point of Approach limits are set to give a
warning when a target or targets enter those limits
around your own ship.
These settings are commonly used for the ATA opera-
tion and AIS operation.