OSD - Own Ship Data

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 $--OSD,x.x,A,x.x,a,x.x,a,x.x,x.x,a*hh<CR><LF>

 Field Number: 
  1) Heading, degrees true
  2) Status, A = Data Valid
  3) Vessel Course, degrees True
  4) Course Reference
  5) Vessel Speed
  6) Speed Reference
  7) Vessel Set, degrees True
  8) Vessel drift (speed)
  9) Speed Units
  10) Checksum