Hold Vs. HILPT

A reader, a helo pilot from the U.S. Coast Guard, wrote to ask some interesting questions. It seems theyd just had an FMS upgrade that enables them to fly RNAV (GPS) approaches. All the approach holds that are course reversals (hold in lieu of procedure turn, HILPT) are shown with four-nautical-mile legs. He asked if it is required to fly the entire leg length. The e-mail discussion evolved to ask if a charted hold, such as a missed approach hold, also had mandatory leg lengths. These probing questions prompted some interesting virtual discussions at IFR.

Frank Bowlin

Wednesday, February 08, 2017 at 12:00 AM ET

Verified

Key Takeaways:

Hold-in-lieu-of-procedure-turn (HILPT) leg lengths can be shortened, but not exceeded, as their primary purpose is course reversal; however, it's best to inform ATC of significant deviations or intentions for extra circuits.
For full holding patterns, charted or assigned leg lengths are generally expected to be flown as depicted to ensure obstacle clearance, though an FAA interpretation suggests shortening DME legs is permissible unless ATC explicitly verbalizes leg lengths.
Despite regulatory nuances and interpretations regarding hold leg lengths, the safest and most practical approach for pilots wishing to deviate from charted or assigned parameters is to always ask ATC for clarification or approval to ensure mutual understanding and compliance.

See a mistake? Contact us.

A reader, a helo pilot from the U.S. Coast Guard, wrote to ask some interesting questions. It seems they’d just had an FMS upgrade that enables them to fly RNAV (GPS) approaches. All the approach holds that are course reversals (hold in lieu of procedure turn, HILPT) are shown with four-nautical-mile legs. He asked if it is required to fly the entire leg length.

The e-mail discussion evolved to ask if a charted hold, such as a missed approach hold, also had mandatory leg lengths. These probing questions prompted some interesting virtual discussions at IFR. Then, just as we were preparing this article, another helo-pilot reader sent us an FAA Legal interpretation mucking with our reasoning.