"Jim Carter" wrote in message news:002f01c6cc9a$0e276310$4001a8c0@omnibook6100.. .

...
certainly identify an LOM, it won't identify an OM.

Ok, it's getting late and I haven't asked enough stupid questions today
so here goes: what is the difference between an Outer Marker and a
Locator Outer Marker? Aren't they the same frequency, same audio pattern
and tone?

Must be late. :-) You'll probably wake up tomorrow and remember...
LOM = LF/MF Compass Locator Beacon at the Outer Marker (used by ADFs).
OM = 75-MHz Fan-shaped or Bone-shaped Beacon, with a pulsing 400-Hz modulation.