Hallo aterpster,
Thank you all for your answers!
Maybe i´m wrong, but when i intend RNAV overlay i intend a conventional SID which is constructed with RNAV waypoints for the whole profile. When a SID is simply conventional it does have a Lateral navigation in the FMS, but these are all waypoints which are not RNAV (officialy i mean) being just based on a reconstruction of the SID from the FMS. So the SID itself is not certified to be flown managed from the FMS profile (altough all of us do it instead of following needles).
In the SID description when i have a SID which is RNAV overlay i have the description of BOTH paths. the one conventional and below the one according RNAV waypoints.
When i just have a conventional SID i just have the conventional description. And, at least for the LIDO charts, this is the case of LHR.
Thanks anyway!
