aTerpster wrote
Here is an RNP AR procedure that does not require any IRU(s), so the loss of GPS could cause the wings to level during the final segment RF leg, thus pointing you at very high terrain.
Just an inquiry, I note you said "could", however, generally, would it be wings level, or would the loss of GPS cause the FMS to go into DR mode, and then continue to provide steering based on previous TAS and wind parameters?