ILS or LOC approach?

I just noticed an approach to Frederick, MD (FDK) entitled "ILS OR LOC RWY
23". I thought every ILS could be flown as a non-precision LOC approach so
why not just call this one the "ILS RWY 23"?

There are actually a few ILS procedures that do not have LOC minima.
That would normally be caused by very high obstacles that would keep the
LOC MDA too high, but are not high enough to penetrate the precision
obstacle clearance slope.
Also, about 2 years ago, the naming convention for ILS procedures in the
TERPS manual was changed, so all procedures that have both precision ILS
and non-precision LOC minima will be called "ILS or LOC", or "ILS or
LOC/DME", etc. These changes take place as the procedures get routine
amendments.
I've heard rumors that there's talk about placing ILS and LOC minima on
separate plates in the future, but can't verify that.
JPH

Dan Wegman wrote:
> I just noticed an approach to Frederick, MD (FDK) entitled "ILS OR LOC RWY
> 23". I thought every ILS could be flown as a non-precision LOC approach so
> why not just call this one the "ILS RWY 23"?
>
>

J Haggerty wrote:

> There are actually a few ILS procedures that do not have LOC minima.
> That would normally be caused by very high obstacles that would keep the
> LOC MDA too high, but are not high enough to penetrate the precision
> obstacle clearance slope.
> Also, about 2 years ago, the naming convention for ILS procedures in the
> TERPS manual was changed, so all procedures that have both precision ILS
> and non-precision LOC minima will be called "ILS or LOC", or "ILS or
> LOC/DME", etc. These changes take place as the procedures get routine
> amendments.
> I've heard rumors that there's talk about placing ILS and LOC minima on
> separate plates in the future, but can't verify that.
> JPH
>
>

You're correct on all counts except there is no plan to have separate charts.

Dan Wegman wrote:

> I just noticed an approach to Frederick, MD (FDK) entitled "ILS OR LOC RWY
> 23". I thought every ILS could be flown as a non-precision LOC approach so
> why not just call this one the "ILS RWY 23"?

The naming convention was changed to conform with Jeppesen's view of what the
rest of the world does in this regard.

Stay tuned. ;-)