If your heading is within 90 degrees of the outbound penetration course on a radial/straight-in approach, you are not required to overfly the IAF and may use normal lead points to intercept the course. Within how many degrees is this true?

If your heading is within 90 degrees of the outbound penetration course on a radial/straight-in approach, you are not required to overfly the IAF and may use normal lead points to intercept the course. Within how many degrees is this true?

• A. 60
• B. 90
• C. 120
• D. 45

Answer: (B)

The key idea is how you join a radial/straight-in approach using intercept geometry. When you’re on a radial and planning to intercept the outbound penetration course, you can use normal lead points to begin the intercept without first overflying the IAF as long as your current heading differs by no more than 90 degrees from that outbound course. Being within a 90-degree window means you’re on the proper side of the course to roll in with a standard lead turn and converge onto the course smoothly, keeping the path stable and predictable. If your heading were more than 90 degrees from the outbound course, you’d be approaching from too far off the side, and repositioning by overflying the IAF would be needed to intercept from the correct direction. So the true threshold is 90 degrees.

The key idea is how you join a radial/straight-in approach using intercept geometry. When you’re on a radial and planning to intercept the outbound penetration course, you can use normal lead points to begin the intercept without first overflying the IAF as long as your current heading differs by no more than 90 degrees from that outbound course. Being within a 90-degree window means you’re on the proper side of the course to roll in with a standard lead turn and converge onto the course smoothly, keeping the path stable and predictable. If your heading were more than 90 degrees from the outbound course, you’d be approaching from too far off the side, and repositioning by overflying the IAF would be needed to intercept from the correct direction. So the true threshold is 90 degrees.