Lead Radials depicted on ILS
Asked by: Ken 9862 views Commercial Pilot, FAA Regulations, Instrument Rating
Question about lead radials (LR), specify the ones depicted on the ILS-2 in Maui (OGG).
I fly this approach often in an old-school 7-3 with only two VOR’s, no GPS or FMS. Normally, we use the DME from the LNY 095 radial to determine when to begin our inbound turn. However, sometimes ATC will cut us in early on a vectored heading, so we are no longer referencing the DME off the LNY 095.
Since we are on a vectored heading, the LNY DME is now slightly off, so last night I suggested we try using the depicted lead in radials, and this seemed to work well. However, in later discussion, my partner said that LR’s should only be used with a DME arc, but this approach has no arc associated with it.
We tried finding a reference to this in the FAA’s IFHB and IPH, but it only makes mention of LR’s when flying an arc, nothing about LR depicted on an ILS, such as the ones depicted on the ILS-2 in Maui.
So, my question: Can we legally use the depicted LR’s on this approach as a reference point to begin our turn to intercept the inbound course? And if LR’s are only to be used with arc’s, why are they depicted on this chart? Is there a source reference for this?
The following terms have been auto-detected the question above and any answers or discussion provided. Click on a term to see its definition from the Dauntless Aviation JargonBuster Glossary.