[Milsurplus] YE - YG considerations

[Nick England]

Some YJ info is here
https://www.ibiblio.org/hyperwar/USN/ref/RADTWOA/RADTWOA-3.html#yj
and YM info here
https://www.ibiblio.org/hyperwar/USN/ref/RADTWOA/RADTWOA-3.html#an/cpn3

Part of an interesting document
https://www.ibiblio.org/hyperwar/USN/ref/RADTWOA/index.html
"The Tactical Use of Radar in Aircraft"

Nick England K4NYW
www.navy-radio.com

On Thu, Nov 12, 2015 at 6:28 PM, Hue Miller <kargo_cult at msn.com> wrote:

> I didn't know this about the YE/YG  :
>
> "However, as range for the YE/YG decreases, the ZB equipment in the
> aircraft will begin to pick up letters in adjacent sectors, but they will
> be weaker than the
> correct sector letter. At close ranges, as many as two letters on either
> side of the correct sector may be distinguished."  ( OPNAV 34-P-0800 )
>
> What does it mean when this says the YE "is synchronized with a gyro
> compass so that each letter is beamed from the ship on a true bearing" ?
> I am missing what is "true bearing" ?   The ship's not travelling that
> fast that the plane can't follow the beam.
>
> The manual also mentions YJ, "a radar beacon which is operated by certain
> types of airborne radar", and YM similar operation but higher frequency .
> I hadn't heard of these two systems before.
>
> I also wonder how far apart they ran these transmitters in the 234-258 MHz
> band. Where more than one was going at a time, like radar picket destroyers
> with YG.
> -Hue Miller
>
>
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