9.1.2.1 NMEA Input
Description
:
This function accepts external data in the NMEA 0183 format.
Advanced Navigation recommends against using NMEA 0183
input wherever possible due to the inefficiency, low accuracy and
precision and weak error checking of the format. All NMEA
messages received must have a valid checksum. Supported
messages are listed below. The recommended combination of
messages are GPGGA, GPVTG and GPZDA with optional
messages GPGSV and GPGSA.
Message ID Description
GPGGA 3D position
GPGLL 2D position
GPRMC 2D position, 2D velocity and coarse time
GPVTG 2D velocity
GPHDT
GNHDT
HEHDT
Heading
GPGSV Satellites
GPGSA Dilution of Precision
GPZDA Time
xxPIPS Depth below surface
xxVBW Water speed, ground speed
xxHDM Magnetic heading
PSIMSSB SSBL position
xxVHW Water speed and heading
xxDBS Depth below surface
Table 24: Supported NMEA messages
9.1.2.2 ANPP Input
Description
:
This function accepts data in the ANPP format as specified in 10
Advanced Navigation Packet Protocol.
When this function is enabled, the auxiliary port functions the same
as the primary port, with two exceptions:
1. The auxiliary port cannot perform a firmware update.
2. When setting the ANPP packet and message output rates,
the changes only apply to the port you are connected to. For
example, you cannot change the primary port packet and
message rates when connected to the auxiliary port.
v2.0 Page 67 04 Nov 2021
GNSS Compass Reference Manual • Interfacing
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