Final answer:
The EGI GPS mode status 'P(Y) Code' indicates that the receiver is using the P(Y) signal, which is a secure military GPS signal that requires proper decryption keys.
Step-by-step explanation:
The EGI GPS mode status "P(Y) Code" indicates that the receiver is only processing the P(Y) signal. The P(Y) code is an encrypted GPS signal intended for military use, providing a higher level of accuracy and security. Civilian receivers typically do not have access to this signal and rely on the C/A code (Coarse/Acquisition code) for positioning information. The P(Y) code can only be decrypted with the appropriate cryptographic key, which is generally restricted to authorized military equipment.