Dme/n Dme/p

[bounce'em all]

Pretty boring thread, I know...please bear with me.

If I'm not mistaken, the nomenclature had something to do with MLS associated distance measuring kit (P for precision and N for, I guess, normal ???). Just bumped into one of these reading a notam.
Any knowledgeable fellow out there ?
thanks.

[welliewanger]

You're pretty much right there. Here's some more info:
Microwave landing system - Wikipedia, the free encyclopedia (http://en.wikipedia.org/wiki/Microwave_landing_system)