During a back-course approach, an aircraft typically approaches the instrument runway from which end?

• A. From the end where the localizer antennas are installed.
• B. From the opposite end of the runway.
• C. From the runway centerline.
• D. From either end without regard to localizer.

Answer: (A)

In a back-course approach you’re using the localizer signal in reverse sense, coming in toward the runway from the end where the localizer antenna array is located. The localizer transmitter/antenna is placed at that end, and approaching from that same end lets you receive a usable inbound guidance along the runway centerline when using the back-course indication. Approaching from the opposite end or without regard to the localizer wouldn’t provide the correct reverse-bearing guidance needed for a back course.