Simrad Simrad SP70, Installation Manual

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Technical specifications
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851-164336 / D
Global Positioning System (GPS)
The SP70 can interface an external Global Positioning System
(GPS) via Ethernet or by a serial line using the NMEA 0183
standard for reception of the present vessel position. The system
will assume the position to be received in WGS84 datum.
The SP70 will receive the following NMEA telegram:
•
Geographical position
•
Actual course and speed relative to the ground
•
Global positioning system fix data
•
Time and date
Geographical position
$??GLLddmm.hh,N,dddmm.hh,W,hhmmss.ss,A<cr><lf>
where (from left towards right):
Component Content
?? Code for the system used.
OM = Omega, LC = Loran C etc
GLL Geographical latitude longitude
ddmm.hh,N Latitude position in degrees, minutes and hun-
dredths, N = North, S = South
ddmm.hh,W Longitude position in degrees, minutes and hun-
dredths, W = West, E = East
hhmmss.ss UTC time
A Status
Actual course and speed relative to the ground
$??VTG,x.x,T,x.x,M,x.x,M,,y.y,N,,<cr><lf>
where (from left towards right):
Component Content
?? Talker
VTG Identifier code for the type of system used
x.x,T Track bearing, in degrees true
x.x,M Track bearing, in degrees magnetic
y.y,N Speed, with resolution 0.1 knots