TTM - Tracked Target Message

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 $--TTM,xx,x.x,x.x,a,x.x,x.x,a,x.x,x.x,a,c--c,a,a*hh<CR><LF>

 Field Number: 
  1) Target Number
  2) Target Distance
  3) Bearing from own ship
  4) Bearing Units
  5) Target speed
  6) Target Course
  7) Course Units
  8) Distance of closest-point-of-approach
  9) Time until closest-point-of-approach "-" means increasing
  10) "-" means increasing
  11) Target name
  12) Target Status
  13) Reference Target
  14) Checksum