Plain English Meaning
A fixed math rule used to create a short fingerprint of a chunk of navigation data, so the system can later check that the data has not been changed or damaged.
Full Definition
A specific mathematical formula used to calculate a Cyclic Redundancy Check (CRC) value over a block of navigation data. The generator polynomial is applied to the data to produce a short check value that travels with the data; the receiving system applies the same polynomial to verify the data has not been altered or corrupted in transit or storage.
Context Anchor
Seen in discussions of navigation database quality control, especially how database providers and aircraft systems check that procedure data remains intact.