[Milsurplus] Naval Aviation Navigation

[D C *Mac* Macdonald]

I had thought that the DME portion was actually a
transponder that sent out the pulse in response to
an interrogation signal from the aircraft.  Admittedly,
it's been a long time since I had contact with this
sort of thing.  Last time I worked in avionics was
in 1984 and tech school was long before that!

73  ---  Mac, K2GKK/5



----Original Message Follows----
From: C Whitaker <whitaker at pa.net>
Reply-To: whitaker at ieee.org
To: "D C (Mac) Macdonald" <k2gkk at juno.com>
CC: whitaker at ieee.org, milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Naval Aviation Navigation
Date: Tue, 14 Mar 2006 09:30:04 -0500

de WB2CPN

Mac, the antenna wouldn't have to rotate and produce
the azmuth information if all you wanted is DME.   On
a VORTAC the VOR antenna rotates a heart-shaped
pattern which makes the azmuth info.  The 12 uS pulsed
DME signal antenna usually sits on top of the VOR antenna,
is omni-directional, and doesn't rotate.

73  Clete