These crossing points on the arc are more helpful suggestions than hard rules. How you take the hint depends on both the approach in question and your relative velocity.
Lead Radial tip-offs
Despite the quips about aviator egos barely fitting inside the cockpits that carry them, pilots have a high tolerance for following directions.
Key Takeaways:
- DME arcs are a less common, but still relevant, navigation technique used to intercept approach courses, often employing lead radials for complex intercepts.
- Lead Radials (LRs) are charted reference points, typically two miles along the arc from the inbound course, specifically to aid pilots when the intercept angle is not 90 degrees.
- These LRs are suggestions, not strict turn initiation points, requiring pilots to still account for groundspeed and understand they do not signify being established on the final inbound course.
- While modern GPS systems may use LRs as turn points, pilots must remain vigilant, adjust as needed, and cannot step down in altitude until truly established on the inbound course.
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