I cannot find this simple answer.... must be looking in the wrong places....
I know that RAIM is required when conducting a GPS Instrument Approach Procedure, but is it required just to even depart IFR, knowing that you will be using your GPS to navigate in the terminal and enroute phases of flight too (AKA - any flight other than the IAP)?
A more simple way to ask this question.... When exactly is RAIM required? :)
The AIM is giving me ALMOST answers... but I am not totally satisfied with what I am finding yet.