2.Press the [2] key twice to select OFF from the ERASE field.
3.Press the [ENTER/SELECT] key followed by the [MENU] key.
Setting CPA/TCPA alarm ranges
When the predicted CPA of any target be- comes smaller than a preset CPA alarm range and its predicted TCPA less than a preset TCPA alarm limit, the EPA releases an au- dible alarm and displays the warning label COLLISION appears on the screen. In addi- tion, the EPA symbol changes to a triangle and flashes together with its vector.
Provided that this feature is used correctly, it will help prevent the risk of collision by alert- ing you to threatening targets. It is important that GAIN, A/C SEA, A/C RAIN and other radar controls are properly adjusted.
CPA/TCPA alarm ranges must be set up prop- erly taking into consideration the size, ton- nage, speed, turning performance and other characteristics of own ship.
CAUTION
CPA/TCPA Alarm
The CPA/TCPA alarm feature should never be relied upon as the sole means for detect- ing the risk of collision.
The navigator is not relieved of the respon- sibillity to keep visual lookout for avoiding collisions, whether or not the radar or other plotting aid is in use.
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1. | MARK DISP |
| OFF | ON |
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2. | ERASE |
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3. | VEC REF |
| REL |
| TRUE |
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4. | VEC TIME |
| 30S |
| 1M | 3M | 6M |
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| 15M | 30M |
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5. | CPA SET |
| OFF |
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| 2NM | 3NM | 4NM |
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| 5NM | 6NM |
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6. | TCPA SET |
| 30S |
| 1M | 2M | 3M |
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| 4M | 5M | 6M | 12M | 15M | ||
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7. | TRACK |
| OFF |
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8. | AUDIO ALARM |
| OFF |
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9. | INTVAL* |
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| 30S |
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0. | ↓ * |
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* Requires ATA Board
Figure 1-27 PLOT menu
3.Press the [5] key for CPA SET or [6] key for TCPA set.
4.Press the [5] key or [6] key again to se- lect CPA or TCPA range desired.
5.Press the [ENTER/SELECT] key to reg- ister your selection.
6.Press the [MENU] key to close the menu.
Silencing CPA/TCPA audible alarm
Press the [AUDIO OFF] key to acknowledge and silence the CPA/TCPA aural alarm.
The flashing of the triangle plot symbol and vector remain on the screen until the dan- gerous situation is gone or you intentionally terminate tracking of the target by using the trackball.
To set the CPA/TCPA alarm ranges:
1.Press the [MENU] key.
2.Press the [7] key twice to display the PLOT menu.
Lost target alarm
When the system detects a lost target, track- ing on the target is discontinued and the tar- get symbol becomes a flashing diamond. The normal plotting symbol is restored to the tar- get when the target is manually acquired. If not reacquired the flashing diamond is auto- matically erased. To confirm a lost target, place the cursor on it and press the [CAN- CEL/CLEAR] key.