Route Data from OpenCPN

[Techstyle]

SignalK rounds up and publishes data that OpenCPN uses, but when a route is set in OpenCPN, there is a bunch of sentences sent by OpenCPN that can be used on other chartplotters around the boat, as well as Autopilots.

see attached picture, the sentences are listed below:

‘EC’ = Electronic chartplotter identifier
‘RMB’ = Recommended Minimum Navigation Information – includes waypoint destination Long/lat, distance to destination, closing velocity
‘RMC’ = Recommended Minimum Navigation Information – time stamp, current position, SOG, TMG
‘APB’ = Autopilot Sentence "B" – includes direction to steer, bearing to waypoint and waypoint ID
‘XTE’ = Cross Track error – includes error magnitude, direction to steer 

what is the 'correct' way to get these extra sentences into SignalK and update the sentences that are superceeded - for example the 'RMB' sentence is typically sent by SignalK from basic GPS info, but it is missing the waypoint information until OpenCPN provides it

thanks
Techstyle