9ņ1
9.1 FAULT FINDING
In case of semiconductor circuits, it is deemed that there are few cases in which the used semiconductor
devices have inferior quality or performance deterioration except due to insufficient design or inspection
or by other external and artificial causes. In general, the relatively many causes are disconnection in a
high-value resistor due to moisture, a defective variable resistor and poor contact of a switch or relay.
Some troubles are caused by defective parts, imperfect adjustment (such as tuning adjustment) or
insufficient service (such as poor cable contact). It will also be effective to check and readjust these points.
9.1.1 List of Alarms and other Indications
If any of the following alarm occurs, the system displays the alarm message in red in order to attract the
attention of operator. Other messages are displayed with the suitable color which is yellow or blue
depending on the level of message importance.
Alarm:
Red
à£Collision-related Alarm
à£Navigation Alarm
à£System Alarm
Warning:
Yel l ow
à£System Warning
Information:
Blue
à£Operation Information
Table 9-1 List of Notification
Message Class Description ALR No.
CCRP Changed INFO CCRP is automatic changed.
Copying INFO Display is capturing to file.
GPS (HDOP) Warning The HDOP level is increased (Decrease in the GPS accuracy.).
GPS(Low Integrity) Warning GPS Low integrity
MON Test Warning Performance monitor is active.
Position Reset INFO Change the latitude and longitude sentence.
Set GYRO INFO Set a course with the gyro.
TM Reset INFO Use care of resetting TM.
TXRX(Standby) INFO Scanner Ready for transmission
Weather Information INFO Weather information received.
ALR No: Unique alarm number in ALR sentence and ACK sentence.
Table 9-2 List of Target Tracking Alarms and AIS Function Critical Alarms
Message Class Description ALR No.
AIS(CPA/TCPA) Alarm There is a AIS dangerous target. 931
TT(CPA/TCPA) Alarm There is a TT dangerous target. 301
ALR No: Unique alarm number in ALR sentence and ACK sentence.
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