Appendix B Alert List
B-4 
Message  Explanation 
Heading(unavailable)  The Heading data cannot be received. 
ISW(Communication error)  There is a communication error with ISW. 
LAT(Out Of Bounds) 
The ship is out of the system operating latitude 
range. 
LCD Fan  LCD unit fan is abnormal. 
LCD High TEMP 
The temperature of LCD is too high. It will be dim 
or dark. 
Lost(AIS) 
Signals of AIS target have become unable to 
receive. The current position is predicted based on 
the data received last. 
Lost(TT) 
The TT target has been lost sight of. It is because 
the reception condition is bad or the target has 
entered other object's shadow. 
New Target(AIS) 
The target of AIS has been complemented and 
activated. 
New Target(TT)  The target of TT has been complemented. 
No.#n Radar(Communication failed, LAN) 
Communication with No.1 RADAR cannot be 
performed via LAN. 
OPU1(Communication error) 
There is a communication error with the operation 
unit 1. 
OPU1(Keyboard Connection) 
Key / encoder circuit was detected an open error in 
the operation unit 1. 
OPU1(USB/Card Connection) 
USB / chart card circuit was detected an open 
error in the operation unit 1. 
OPU2(Communication error) 
There is a communication error with the operation 
unit 2. 
OPU2(Keyboard Connection) 
Key / encoder circuit was detected an open error in 
the operation unit 2. 
OPU2(USB/Card Connection) 
USB / chart card circuit was detected an open 
error in the operation unit 2. 
Position(doubtful)  The integrity of Position cannot be verified. 
Position(invalid) 
There is a format error or a status error of the 
Position data. 
Position(not plausible)  The plausibility of Position data cannot be verified. 
Position(unavailable)  The Position data cannot be received. 
Power Fail 
Power incoming of 3.3V/2.5V/1.5V/1.2V etc. has 
decreased and stopped. 
PROC(AZI) 
An azimuth signal error has occurred at the signal 
processing unit. 
PROC(HL) 
A heading line signal error has occurred at the 
signal processing unit. 
PROC(Interrupt 1) 
There is a stern interrupt error in the signal 
processing unit. 
PROC(Interrupt 2) 
There is a stern interrupt error in the signal 
processing unit. 
PROC(Trigger) 
A trigger signal error has occurred at the signal 
processing unit.