NMEA output more Data than just GPS

[geofrancis]

Currently mission planner can only output NMEA GPS data but what would be very useful would be the ability for it to output other NMEA type sensors like:

Rangefinder/depth sounder Temperature Water speed Wind speed and direction AIS it would let mission planner interface with marine equipment much easier, All of this is available in mission planner so it would just need converted to NMEA. https://discuss.ardupilot.org/t/navigation-charts-for-boat/81396/14?u=geofrancis