Hardware manual
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990-0000058-1000  Rev F  Page 30 
NOTE: 
The hhmmss.ss field is optional. 
VTG – Track Made Good and Ground Speed 
The actual track made good and speed relative to the ground 
$--VTG,x.x,T,x.x,M,x.x,N,x.x,K*hh<CR><LF> 
Table 4-9 VTG-Track Made Good and Ground Speed 
ARGUMENT 
DESCRIPTION 
x.x  Floating point numeric 
T Degrees True 
M Degrees Magnetic 
N knots 
K Kilometer/hour 
NOTE: 
Magnetic heading corrected for local deviation and Easterly/Westerly variation 
would provide more accurate True vessel heading in degrees. 
DBT – Depth Below Transducer 
$--DBT,x.x,f,x.x,M,x.x,F*hh<CR><LF> 
Table 4-10 Depth Below Transducer 
ARGUMENT  DESCRIPTION 
x.x  Floating point numeric 
f  f = feet 
M  M = meters 
F  F = Fathoms 
DPT - Heading - Deviation & Variation 
$--DPT,x.x,x.x*hh<CR><LF> 










