Veripos LD6 Operation Manual page 86

Procedure Title: LD6 Operations Manual (B Variant)
File Ref.: AB-V-MA-00589
NMEA RMC Sentence
NMEA has its own version of essential gps pvt (position, velocity, time) data. It is called
RMC, The Recommended Minimum, which will look similar to:
$GPRMC,123519,A,4807.038,N,01131.000,E,022.4,084.4,230394,003.1,W*6A
Where:
RMC
123519
A
4807.038,N
01131.000,E
022.4
084.4
230394
003.1,W
*6A
Note that, as of the 2.3 release of NMEA, there is a new field in the RMC sentence at the
end just prior to the checksum. For more information on this field.
NMEA HDT Sentence.
The NMEA HDT sentence provides heading information which can be input to the LD6 for
displaying on the DP Orion software.
$GPHDT,xxx.xx,T*hh<CR><LF>
where:
$GPHDT – is the message name stating it is a GPS heading (true) message
xxx.xx – this is the heading
T – states the heading is true
*hh – is the check sum for the message
NMEA THS Sentence
The NMEA THS provides heading information which can be input to the LD6 for displaying
on the DP Orion software. This sentence includes a "mode indicator" field providing critical
safety related information about the heading data.
$GPTHS,x.x,a*hh<CR><LF>
Where:
$GPTHS - is the message name stating it is a GPS heading (true) message
x.x – Heading value (True)
a – Mode indicator
*hh – Checksum
Rev No: A4
Recommended Minimum sentence C
Fix taken at 12:35:19 UTC
Status A=active or V=Void.
Latitude 48 deg 07.038' N
Longitude 11 deg 31.000' E
Speed over the ground in knots
Track angle in degrees True
Date - 23rd of March 1994
Magnetic Variation
The checksum data, always begins with *
Page 86