6.4 Error Messages
6-36
6.4.2 AIS ALARM message
Alarm messages sent from the AIS unit can be displayed by “8. AIS ALM MESSAGE”
in the [AIS] box menu. These messages are described by ALR sentences. When an
alarm is detected on the FA-100 or the FA-150, the ALM sentences are outputted every
25 seconds.
Table 6.4.6 List of AIS Alarm Message
Error display
AIS
side
Radar side
Description
TX Tx malfunction Transmission malfunction, transmission stop
ANT Antenna VSWR exceeds limit
Possible cause: Antenna damage.
Continues operation is enabled.
CH1 Rx channel 1 malfunction
TDMA Rx1 board malfunction. Transmission through
the corresponding transmitting channel is stopped.
CH2 Rx channel 2 malfunction
TDMA Rx2 board malfunction. Transmission through
the corresponding transmitting channel is stopped.
CH70 Rx channel 70 malfunction
DSC Rx board malfunction. Transmission through
CH70 is stopped.
MKD
MKD connection lost
(MKD: Minimum Keyboard
and Display)
MKD connection is disconnected. Continuous
operation is enabled. (Actually this display is not
present.)
EPFS
External EPFS lost
(EPFS: Electronic position
fixing system)
Data of an external navigation system is discontinued.
Continuous operation is enabled.
L/L No sensor position in use Position data for use is not present.
SOG
No valid SOG
information
(SOG: Speed Over Ground)
SOG information is invalid data.
COG
No valid COG information
(COG: Course Over Ground)
COG information is valid data.
HDG Heading lost/invalid HDG data is discontinued / invalid.
ROT
No valid ROT
information
(ROT: Rate of Turn)
HDG data and $TI-ROT data are not present.
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