Appendix A Alert List  A-8 
 
The AIS alerts received from external sensors are as shown below. 
For the AIS alerts received from external sensors, alert messages are suffixed by (External). 
Example:    Antenna VSWR exceeds limit (External) 
 
 
Message  Subject  Explanation  Alert ID 
Antenna VSWR exceeds limit    AIS  Antenna output error  002 
Data Flash memory err    AIS  Transponder data storage circuit error  063 
external EPFS lost    AIS  Abnormality in external EPFS connection  025 
general failure    AIS  General error  006 
Heading lost/invalid    AIS  Ship's heading data has not been input or is 
invalid. 
032 
MKD connection lost    AIS  Abnormality in the connection between the 
transponder and the controller 
008 
mkd connection lost    AIS  No response from the transponder (detected in 
the display) 
064 
no sensor position in use    AIS  Internal GPS data has not been input or is 
invalid. 
026 
no valid COG information    AIS  COG data has not been input or is invalid.  030 
no valid ROT information    AIS  ROT data has not been input or is invalid.  035 
no valid SOG information    AIS  SOG data has not been input or is invalid.  029 
Not Transmitting Tx 
malfunction   
AIS  Malfunction at or during transmission  001 
Pa current error    AIS  Error in the current during transmission  054 
Pa temp error    AIS  Abnormal temperature rise during 
transmission 
055 
Power supply error    AIS  Error in power supply voltage  053 
Program Flash memory err    AIS  Control circuit error of the transponder  062 
Rx channel 1 malfunction    AIS  Malfunction of reception channel 1  003 
Rx channel 2 malfunction    AIS  Malfunction of reception channel 2  004 
Rx channel 70 malfunction    AIS  Malfunction of reception channel 70  005 
SSD mismatch    AIS  Mismatch in static information (between the 
display and the transponder) 
065 
Tx pll unlock    AIS  Error in the synthesizer circuit for transmission  060 
Tx power down    AIS  Transmit by reducing output power due to error  051 
Tx power supply error    AIS  Error in power supply voltage during 
transmission 
052 
Tx power too high    AIS  Power is higher than the specified 
transmission power. 
059 
Tx power too low    AIS  Power is lower than the specified transmission 
power. 
056 
Tx stop interrupt    AIS  Transmission is forcibly stopped by the 
transmission monitoring circuit. 
058 
Vr error    AIS  Transmission system output error  057