C-Nav 2050, User Manual

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2050 User Guide
Address Field
An address field is the first field in a sentence and follows the "$" delimiter, it serves
to define the message. Characters within the address field are limited to digits and
upper case letters. The address field may not be a null field. Only sentences with the
following two types of address fields may be transmitted
:
•
Approved NMEA-0183 Address Fields
•
Proprietary NMEA-0183 Address Fields
Approved NMEA address fields consists of five characters defined by
the NMEA-0183 standard. The first two characters are the TALKER
Identifier, examples of which are listed in the below:-
EC - Electronic Chart Display & Information System (ECDIS)
GL - GLONASS Receiver
GN - Global Navigation Satellite System (GNSS)
GP - Global Positioning System (GPS)
HC - Heading Sensors, Compass, Magnetic
HE - Heading Sensors, Gyro, North Seeking
HN - Heading Sensors, Gyro, Non-north Seeking
II - Integrated Instrumentation
IN - Integrated Navigation
VM - Velocity Sensor, Speed Log, Water, Magnetic
VW - Velocity Sensor, Speed Log, Water, Mechanical
WI - Weather Instruments
ZA - Timekeepers, Time/Date, Atomic Clock
ZC - Timekeepers, Time/Date, Chronometer
ZQ - Timekeepers, Time/Date, Quartz
ZV - Timekeepers, Time/Date, Radio Update, WWV or WWVH
Note – This is not a complete list of all NMEA-0183 Talker Identifier Mnemonics.
The next three characters form the Sentence Formatter Idetifier used to define the
format and the type of data to follow the address field.
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