Rutter VDR-100G3 - AIS Data Parsing; Verification of NMEA Recording

Chapter 10: NMEA Module, Rev. 1.3
The NMEAModule”X”IDStart key (where X is the position of the NMEA module as it is in the
array of NMEA modules, if applicable) specifies the first channel ID for NMEA module X.
EXAMPLES
 NMEAModule1IDStart is the first channel ID for NMEA module 1—under normal
circumstances this is the NMEA module connected to the VDR via the Ethernet
connection,
 NMEAModule2IDStart is the first channel ID for NMEA module 2,
 NMEAModule3IDStart is the first channel ID for NMEA module 3, etc.
10.5.4.2 AIS Data Parsing
The NMEA Module is capable of accepting AIS data. The AISLocation parameter in the
vdrparams.ini specifies the port on which AIS data is being received.(Refer to Table 10-4 - Editing
NMEA Parameters for the available options).
AIS data received by the NMEA module is automatically recorded by the VDR Record application
to the internal hard drive. The VDR Record application will not send AIS data to the FRM unless
the EnableAISParsing parameter is set to zero (0). The default is “0”. If EnableAISParsing is
set to “0” the VDR Record application will look at the AISMuxID parameter for the location of
where the AIS data is being input. Otherwise, if EnableAISParsing is not enabled the AISMuxID
is ignored.
A sample AIS string may read:
11!AIVDM,1,1,,B,139Kcl002W0TMVvPK@bGlV;N0HKO,0*7B
In the above sample, the “11” header indicates that the AIS data is being received on the first (1)
channel of the first NMEA Module.
10.5.5 Verification of NMEA Recording
To ensure compliance with IMO regulations, information from each NMEA source must be
verified and validated using the methods in the following sections. Begin each test by following
the steps provided below:
1. Start the VDR_Record application.
2. Deselect Record from the Tests menu.
3. Select NMEA Test. from the Tests menu.
NMEA Test – Activates the NMEA Test mode. In this mode all the NMEA data will be
displayed as it is received in the VDR Record Log Window, as defined in the
VDRPARAMS.INI file.
4. Ensure that data from the time source is present in the NMEA data window. One of the
following strings must be present: $GPZDA, $GPGGA or $GPGLL NMEA. However,
other strings may be observed as well.
VDR-100G3/G3S Installation Manual 15/01/2009
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