Final answer:
The published procedure takes precedence over the retrieved GPS procedure from a non-corruptible database.
Step-by-step explanation:
If there is a difference between a retrieved GPS procedure from a non-corruptible database and the published paper copy procedure, the published procedure takes precedence.
The published procedure is the authoritative and official version that is widely recognized and accepted. It is the standard that should be followed to ensure consistency and safety. The GPS procedure in the non-corruptible database may be outdated or contain errors, which is why the published procedure is given priority.
For example, if the retrieved GPS procedure instructs the crew to take a different route than the published paper copy procedure, they should follow the instructions in the paper copy procedure.