When determining EFR at IAF for the practice drop in approach, what should you do with the total EFR number?

When determining EFR at IAF for the practice drop in approach, what should you do with the total EFR number?

• A. Subtract 50
• B. Subtract 10
• C. Add 50
• D. No change

Answer: (A)

When planning the practice drop-in approach, you adjust the EFR for where you actually begin the approach—the Initial Approach Fix. The reference EFR includes a standard offset, but at the IAF you start 50 feet lower than that reference. Therefore you subtract 50 from the total EFR to get the EFR to use at the IAF. This keeps your descent path aligned with the final approach from the point you start, preventing your profile from being too high or too steep. Subtracting other amounts or leaving it unchanged would misalign your vertical path with the intended approach, so the correct adjustment is a downward 50-foot correction.

When planning the practice drop-in approach, you adjust the EFR for where you actually begin the approach—the Initial Approach Fix. The reference EFR includes a standard offset, but at the IAF you start 50 feet lower than that reference. Therefore you subtract 50 from the total EFR to get the EFR to use at the IAF. This keeps your descent path aligned with the final approach from the point you start, preventing your profile from being too high or too steep.

Subtracting other amounts or leaving it unchanged would misalign your vertical path with the intended approach, so the correct adjustment is a downward 50-foot correction.