RTE - Routes

        1   2   3 4    5           x    n
        |   |   | |    |           |    |
 $--RTE,x.x,x.x,a,c--c,c--c, ..... c--c*hh<CR><LF>

 Field Number: 
  1) Total number of messages being transmitted
  2) Message Number
  3) Message mode
     c = complete route, all waypoints
     w = working route, the waypoint you just left, the waypoint you're heading to then all the rest
  4) Waypoint ID
  x) More Waypoints
  n) Checksum