Just glanced at the Skymap IIIc manual
here. On page F-1, it shows that the IIIc outputs standard aviation format at 9600 baud, which the D180 will accept.
Also, this post shows the Skymap IIIc working with our products:
http://dynonavionics.com/cgi-bin/yabb2/YaBB.pl?num=1168298819/10#10
