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Appendix A
A.1
Description
Access
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A.2
Description
Header
58
NMEA Message Formats
Overview
National Marine Electronics Association is a standard for interfacing marine
electronic devices. This chapter describes all NMEA-0183 messages which can
be output by the instrument.
NMEA can be configured via the web interface. For further informa-
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tion refer to the Web Interface User Guide.
A Talker ID appears at the beginning of the header of each NMEA message.
The Talker ID can be user defined or standard (based on the NMEA 4.0).
For information on how to manually define the Talker ID, refer to the
☞
Web Interface User Guide.
When enabling CQ Control, the coordinate quality is being checked. If the
coordinate quality of the position and/or the height component exceeds the
defined limit, no NMEA messages are output.
Symbols Used for Describing the NMEA Formats
NMEA messages consist of various fields. The fields are:
Header
•
Special format fields
•
Numeric value fields
•
Information fields
•
Null fields
•
Certain symbols are used as identifier for the field types.
These symbols are described in this section.
Symbol
Field
$
-
--ccc
Address
Description
Start of sentence
-- = alphanumeric charac-
•
ters identifying the talker
Options:
GN = Global Navigation
Satellite System
GP = GPS only
GL = GLONASS
GA = Galileo
GB = BeiDou
NMEA Message Formats
Example
$
GNGGA
GPGGA
GLGGA
GAGGA
GBGGA
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