Hello,
I am adding some missing CAI302 sentences to the LK8000 free software I am developing, and from Cambridge specs I can't understand what is the difference between "true altitude" sent from a !w,xxx,xxx,xx etc sentence and the $PCAID barometer altitude.

I understood that the CAI302 does not send !w sentences, but I guess that the 302A sends both. So if they are the same I am very happy, otherwise I need to know the difference.
Any help will be appreciated!

Paolo