28 |
Operation |
NAIS-400 Instruction Manual
Green Amber
Red
Blue
Indicator lights
Figure 13 Indicator location on the AIS transceiver unit
The meaning of typical indicator configurations is shown in the
table below and Figure 13 shows the orientation of the AIS trans-
ceiver.
Green indicator only
The AIS transceiver is powered up, has a position fix and has
transmitted at least one vessel information report.
Red indicator only
The AIS transceiver has detected a system error. The likely causes of
this are detailed in the troubleshooting guide in chapter 6. Diagnostic
messages displayed in proAIS2 may also help troubleshoot the cause
of the error.
Amber and blue indicators
When silent mode is activated, using the optional silent mode
switch, this combination of indicators is illuminated to show that the
transmitter is disabled.
Amber indicator only
The AIS transceiver is in ‘transmit timeout’ mode. This can be for a
number of reasons:
- the unit has only recently been powered on and is obtaining a
position fix prior to transmitting its first vessel information report.
(This process can take several minutes).
- position fix has been lost. The AIS transceiver will attempt to regain
position fix for 30 minutes before entering an error state.
- the AIS radio channels are exceptionally busy, so there is currently
no available timeslot for transmission.
- the unit has been in silent mode and after deactivating silent mode
this amber indicator will illuminate until the first AIS message has
been sent.
- the AIS transceiver has been commanded by the local authority (via
an AIS base station) to cease transmissions.
