David,
I hate to be the bearer of ill news, but no.
A client bought one and has since removed it for this reason.
The only choice is to buy a C-Map Planner package (~200$us). That is a
package of software, C-Map user memory and a USB writer. That will
allow you to configure waypoints and write then to the C-Map memory and
then pull them into the Sitex.
Needless to say, this prevents any realtime route changes while underway
(a common issue in keel boat racing).
It will output NMEA navigational data for your autopilot and tactical
package. But like so many navigators - It just doesn't listen....
Sorry,
Matt Colie (aka Yachtsman's Technical Support <
www.yachtek.com>)