Vtg.message; Rmc Message; Gsa Message; Table 6-5: Vtg Message Comparison - Navman Jupiter 31 Manual

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In the J21 the hour, minute, second portion within the ZDA message will look like this:
(for hour: 01, minute: 02, and seconds 10, 11, 12,...)
,010210.00,
,010211.00,
,010212.00,
In the J31 the following will be output for the hour, minute and second:
,010210,
,010211,
,010212,
Thus the J21 format simply appends the fixed string ".00" to the two digit seconds field.
NOTE: With J31, the ZDA message format does not include the additional two digit fields as
described above.
6.2.4 VTG message
$GPVTG,309.62,T,286,52,M,0.13,N,0.20,
VTG
K,A*23
NOTE: The J31 does not currently support Magnetic variation.
$GPVTG,26.96,T,,M,0.05,N,0.1,K*5F

6.2.5 RMC message

$GPRMC,161229,487,A,3723.2475,N,1215
RMC
8.3416,W,0.130,309.62,120598,,E*10
Note:
There is additional resolution in the time field:
,161229,487,
There is additional resolution in the Course over Ground field:
,309.62,
Note: The J31 does not support magnetic variation.
J31 output:
$GPRMC,133138.000,A,5133.2768,N,00150.4530,W,0.05,26.96,030907,,*20

6.2.6 GSA message

$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.8,
GSA
1.0,1.5*33
LA010812A © 2007 Navman Wireless. All rights reserved. Proprietary information and specifications subject to change without notice.
J31

Table 6-5: VTG message comparison

J31

Table 6-6: RMC message comparison

J31

Table 6-7: GSA message comparison

J21
$GPVTG,309.6,T,286,5,M,0.130,N,0.200,
K,A*23
J21
$GPRMC,161229,A,3723.2475,N,12158.34
16,W,0.130,309.6,120598,23.1,E*10
J21
$GPGSA,A,3,07,02,26,27,09,04,15,,,,,,1.80
,1.00,1.50*33