7 ATA (Automatic Tracking Aid)
■ATA (Automatic Tracking Aid)
By tracking automatically the target chosen by the cursor key, the closest point of approach (CPA) and the time to closest point of approach (TCPA) limit of a own ship and a target are calculated.
ATA is the function to tell about to alarm sound, when both CPA and TCPA becomes below a setting value (the ap- proach watch area).
The range of the target which can be registered is taken as a target with a highest luminosity level of
•Max. 10 targets can be plotted on the screen.
•Plot positions shall be identified by an approved symbol mark (p. 20) and associated plot number.
•The vector origin will move across the screen at a rate and direction defined by the calculated true or relative course and speed.
•The vector will be displayed on the target.
•Display accuracy may increase by the
■ATA menu setting
| A T A MENU |
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| ||
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| ON |
A T A |
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| OFF |
| |
No.DISP |
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| OFF |
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| SEL | ||
VECT |
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| REL |
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| TRUE | |||
OWN VECT |
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|
| ON |
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| OFF | |||
ALARM |
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| ON |
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| OFF | |||
CPA LIMIT |
|
| 1.0NM |
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|
TCPA LIMIT |
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| 1 MIN |
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|
ALL
Set the ATA menu items before using the ATA function.
qPush [MENU]/[ 
] several times to turn the ATA menu ON.
w Push [≈] to turn the ATA function ON.
e Push [Ú] to select the “No. DISP” to select the tar- get identification number type which appears at the right side of the mark. Push [Ω ≈] to select the ap- propriate type.
• OFF: No number appears.
• SEL: Number appears by the selected mark only.
• ALL: All numbers appear by the marks.
rPush [Ú] to select “VECT”; push [Ω ≈] to 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.
tPush [Ú] to select “OWN VECT”; push [Ω ≈] to turn the own vect function ON or OFF.
•OFF: For not displaying the own ship vector.
•ON: To display your own ship’s vector.
yPush [Ú] to select “ALARM”; push [Ω ≈] to turn the alarm function ON or OFF.
•ATA alarm is emitted when both CPA and TCPA reaches the limit.
uPush [Ú] to select the “CPA* LIMIT”; push [Ω ≈] to set the CPA limit distance.
iPush [Ú] to select the “TCPA* LIMIT”. Push [Ω ≈] to set the TCPA limit time.
*CPA/TCPA: Closest Point of Approach and Time to Closest Point of Approach limit is defined by the ob- server to a given warning when a target or targets are close to within those limits from your own ship.
o Push [MENU]/[ 
] to exit the ATA menu.
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