On Wed, 17 Jan 2007 19:38:04 +0000, Peter
wrote:


Bill Zaleski wrote

When within 10 degrees of the published course.

That's not a lot, since NDBs can be anything up to 30 degrees off,
IME. My local one certainly can be; it's on a coast (SHM at EGKA). But
that IAP is also DME-based.

An NDB is to a shotgun, as an ILS is to a rife with a scope. It's a
let down to an area of probability at a safe, conservative altitude.