212 - the existing hardware is retained, its just "turning on" something that is already in the AFCS software,
crab - fortunately EC have moved away from doppler, and having used it on the L2 I know what it can be like! Our system will just use gps and inertial. The full EC225 SAR fit no longer has doppler, again its inertial but with dual FMS/GPS (dualled for redundancy rather than integrity). Having flown with it in the prototype its certainly rock solid in trans down and auto-hover.
HC