Installation manual

Simrad SD570 / Base version
38
851--160116 / B
The serial line telegram format for the course and speed data:
$xxHDT,ggg.g,T<cr><1f> Heading, Degrees True
$xxHDM,ggg.g,M<cr><1f> Heading, Degrees Magnetic
$xxVGT,ggg.g,T,ggg.g,M,nn.n,N,kk.k,K<cr><1f> Actual track
and ground speed
$xxVHW,ggg.g,T,ggg.g,M,nn.n,N,kk.k,K<cr><1f> Heading
and water speed
xx is indicator for transmitter, for instance:
’HE’ = gyro, earth seeking
’GP’ = Precision Global Positioning System
Heading data:
ggg.g is heading in degrees.
The gyro value can have variable amounts of digits in front of
comma (max. 3), and after comma (min. 0). Comma can also be
omitted. Leading zeroes and spaces are accepted.
In the two last telegrams, the ”True” value is used if both true and
magnetic values are transmitted.
Speed data:
nn.n is speed in Nautical miles
kk.k is speed in Kilometer per hour
The speed value should have min. 1, max. 2 digits in front of
comma, and 1 after. Leading zeroes and spaces are accepted.