[MilCom] RE: [Scan-DC] New 99th AS Callsign

[Sheldon Daitch]

Take a look at:

  http://microvoltradio.com/tacan.htm

The VHF channels listed are for reference only, in that
"real" TACAN equipment normally does not use the VHF
frequency information for anything.

When you have a TACAN, a co-located DME (distance
measuring equipment) and azimuth system, the corresponding
VHF frequency allows DME equipped aircraft to tune their
DME system to that channel, for range information.  The DME
receiver will not display any bearing information, only the
distance information.  If a VOR has a colocated DME system,
the DME channel is automatically paired, frequency-wise, for
that VOR VHF channel.

Trivia, DME readings normally will never go to "zero", for when
an aircraft flies directly over a DME station (or the DME
component of a TACAN,  VORTAC or VOR-DME system,
the aircraft is still a distance away from the DME system, due
to altitude.

73
Sheldon
WA4MZZ


Ron King wrote:

> Hi,
>
> More likely they were using the tacan to assist with the joinn up in a
> similar way that is done with air refueling rather than for a natter.
>
> Rgds Ron
>
> -----Original Message-----
> From: scan-dc-bounces at mailman.qth.net
> [mailto:scan-dc-bounces at mailman.qth.net] On Behalf Of Rapbep at aol.com
> Sent: Wednesday, July 21, 2004 10:02 AM
> To: milcom at mailman.qth.net; scan-dc at mailman.qth.net
> Subject: [Scan-DC] New 99th AS Callsign
>
> All,
>
> Today, in the 0900 hour (EDT) had Mafia 74 and an unidentified Venus
> aircraft
> up in A-A chat on 142.75 AM.  This is normally the Venus Control freq at
>
> Andrews so they were probably using it as an A-A since it's one of their
> pre-sets.
>
> The Venus aircraft was coordinating their navigational routes with Mafia
> 74.
> In their chat Venus asked Mafia 74 to use Tacan 92X as an A-A freq
> instead of
> 92Y, which they didn't have. Mafia 74 was trailing the Venus aircraft
> about 5
> miles to his right and about 4,000 ft lower in altitude.
>
> This is the first time I've heard the Mafia callsign used by Andrews
> aircraft. Must be a new 99th AS call.
>
> Anyone have the freqs for 92X & 92Y so I could plug them in my scanner
> just
> in case.
>
> RON
> MARYLAND, USA
> PRO-2045 W/D-130J DISCONE
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