If an RMP is used to tune the ILS, ____ are tuned to the selected frequency and course.

If an RMP is used to tune the ILS, ____ are tuned to the selected frequency and course.

• A. one ILS radio
• B. both ILS radios
• C. neither ILS
• D. the GPS receivers

Answer: (B)

Tuning an ILS with the Radio Management Panel sets both localizer receivers to the same localizer frequency and inbound course. The ILS system on the A320 is dual-receiver for redundancy, so having both receivers tuned to the selected frequency and course ensures either side of the cockpit can receive the localizer signals and provide the lateral guidance to the flight guidance system. The GPS receivers are separate navigation sources and aren’t involved in tuning the ILS, and tuning only one ILS radio would defeat the redundancy. Thus both ILS radios are tuned to the chosen frequency and course.

Tuning an ILS with the Radio Management Panel sets both localizer receivers to the same localizer frequency and inbound course. The ILS system on the A320 is dual-receiver for redundancy, so having both receivers tuned to the selected frequency and course ensures either side of the cockpit can receive the localizer signals and provide the lateral guidance to the flight guidance system. The GPS receivers are separate navigation sources and aren’t involved in tuning the ILS, and tuning only one ILS radio would defeat the redundancy. Thus both ILS radios are tuned to the chosen frequency and course.