StarNavPilot offers great flexibility in configuring NMEA
communication.
With the default values the software will run
satisfactorily from the first launch without any configuration required. You can
then act on many parameters to adapt the NMEA communication to your needs or for
optimization purposes.
The NMEA configuration window: 
StarNavPilot uses the NMEA sentences GGA, RMC,
GLL, GSV, RMB, DPT, HDG, MWV, RMM, VHW, APB as input and output, the initials of
which can be configured (the first 2 letters of the 5 letter header of an NMEA
sentence). Positioner sentence initials are automatically detected. In this way
the program automatically adapts to a positioner other than a GPS (initial GP).
This automatic detection can be deactivated to filter at this level with a
multistandard positioner. You can select which phrases to use or not and
independently for input and output. The initials of the NMEA sentences are
independent at input and at output so that if the program receives a GNRMC
sentence (general position and route sentence) from a Glonnass receiver, it can
send a GPRMC sentence (the same sentence that would come from a GPS receiver)
for a device that would not understand GNRMC but only GPRMC (the most common
NMEA sentence and often the only one understood by some devices).
By default, the sentence GPRMB is used for the detection of a man overboard
alarm from the positioner or from an external device with the name of the
waypoint generated MOB (parameter used by most of the GPS when the function MOB
is triggered.). You can change the phrase and the name of the waypoint if
needed. See Man overboard
safety
To the standard NMEA sentences are added 4 special
input sentences and 4 special output sentences which can be entirely composed as
needed. All navigation data can be selected to compose a special phrase. In this
way it is possible to make the program understand any communication coming from
a non-standard device. And to output all the desired navigation data in a
sentence specially composed for a device to receive it.
The
magnetic compensation of the compass and pilot is carried out at the level of
the NMEA communication as soon as a data is received from a magnetic compass and
just before a data is sent to an autopilot. In this way the program only knows
"real" magnetic data.
Compass and pilot compensation: 
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