OTHERS
12. Alarms
1.HDG SET
2.SPD MODE
3.MAN SPD
4.SET & DRIFT
5.DISPLAY
6.MARK/LINE
7.TUNE
8.NAV DATA
9.EBL/VRM/+
0.↓
MAN LOG NAV*
LOG
LOG
CPA/TCPA alarm
Visual and audible alarms are generated when the predicted CPA and TCPA of any target become less than their preset limits. Press the [AUDIO OFF] key to acknowledge and silence the CPA/TCPA audible alarm.
The ATA continuously monitors the predicted range at the Closest Point of Approach (CPA) and predicted time to CPA (TCPA) of each tracked target to own ship.
* NAV shown on
Figure 9 OTHER menu
2.Press the [4] key twice to select SET/
DRIFT.
| SET & DRIFT | ||
1. | ↑ |
|
|
2. | SET/DRIFT |
| ON |
OFF | |||
3. | SET | 000.0 | |
4. | DRIFT | ||
Figure 10 SET/DRIFT menu
3.Press the [2] key to select ON from the SET DRIFT field, and then press the [EN- TER/SELECT] key.
4.Press the [3] key twice, enter SET value, and then press the [ENTER/SELECT] key.
5.Press the [4] key twice, enter DRIFT value, and then press the [ENTER/SE- LECT] key.
6.Press the [MENU] key.
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 ATA releases an au- dible alarm. In addition, the target plot sym- bol 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 and the ATA is set up so that it can track targets ef- fectively.
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.
The CPA/TCPA alarm feature should never be relied upon as a sole means for detecting the risk of collision. The navigator is not re- lieved of the responsibility to keep visual look- out for avoiding collisions, whether or not the radar or other plotting aid is in use.
Follow the steps shown below to set the CPA/ TCPA alarm ranges:
1.Press [MENU], [7], [7] to display PLOT MENU 1.
2.Press [5] (CPA SET) to select CPA limit desired from the CPA SET line.
3.Press the [ENTER/SELECT] key.
4.Press [6] (TCPA SET) to select a TCPA limit desired.
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