JPH wrote:
Steven P. McNicoll wrote:

"JPH" wrote in message
news:McsJg.8259$Tl4.7021@dukeread06...

The feeder route from AGC takes the aircraft to the localizer, but
the intersection of that feeder route and loc does not provide enough
divergence to meet criteria for holding in lieu of PT (minimum 45
degrees divergence), so you can't do a course reversal without the
NDB (or suitable substitute) being operational. The feeder from NESTO
is NA without the NDB. It does appear that the planview note should
read "RADAR or DME required" since radar vectors from approach
control to intercept the final would work as long as they had
coverage at suitable altitudes.



Why do I need ADF for the hold in lieu of PT? AGC has DME, if I'm
12.8 DME from AGC on the 076 radial and on the localizer I'm there.

It's not a DME fix. The holding pattern was built using the localizer
and NDB for course guidance. When using a LOC for course guidance the
DME source can't exceed 23 degrees left or right of the LOC course. AGC
appears to be 25 degrees left of the final course.
I suspect if it met criteria for a DME fix, the specialist would have
made it so to prevent having to place the "ADF required" note there.
If AGC was within 23 degrees left/right, they could use the DME to
create a DME fix on the LOC centerline. If it was more than 45 degrees,
they could have made it an intersection with the LOC. Unfortunately,
it's in that grey area where it can't be used for either purpose except
as a route to the NDB.

I see. Thanks for taking the time to explain. Dave