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-12 C-Series Displays Installation Manual
What is NMEA?
NMEA 0183
The NMEA 0183 Data Interface Standard was developed by the National Marine
Electronics Association of America. It is an international standard to enable equipment
from many different manufacturers to be connected together and share information.
The NMEA 0183 standard carries similar information to SeaTalk. However it has the
important difference in that one cable will only carry information in one direction. For
this reason NMEA 0183 is generally used to connect a data receiver and a transmitter
together, e.g. a compass sensor transmitting heading to a radar display.
This information is passed in ‘sentences’, each of which has a three-letter sentence
identifier. It is therefore important when checking compatibility between items that
the same sentence identifiers are used, e.g. VTG carries Course and Speed Over
Ground data, GLL carries latitude and longitude, DBT carries water depth and MWV
carries relative wind angle and wind speed data.
NMEA 2000
The NMEA 2000 Data Interface Standard is the CAN based version of NMEA 0183.
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