Awe C'mon Jon
.....necessary for weaponry aiming but for practical usage in radio
communications...NOT!
oj
----- Original Message -----
From: "W4ZW" <w4zw@comcast.net>
To: "'Jim White, K4OJ'" <k4oj@tampabay.rr.com>; "'Ted Leaf'"
<tleaf@hotmail.com>; <Towertalk@contesting.com>
Sent: Thursday, March 14, 2002 5:17 AM
Subject: RE: [Towertalk] Antennas over Salt Water.
>
> *ships are always turning....making knowing which way a
> *directional antenna was pointed too complex - it is
> *"ever-changing" - only when at anchor would you know your
> *bearings...or have a clue as to where "true North" was -
>
>
> Not necessarily so. Ships, mobile launchers, artillery pieces all have
> the ability to maintain almost perfect orientation no matter what their
> aspect. In fact, many missile launchers, as well as artillery guns have
> a lock out mechanism that only enables a firing when the aspect to
> target is in place. You can execute a fire command, but it will not
> execute until the aspect is there.
>
> Think of a battleship rolling in high seas. How could they ever hit a
> target unless they could maintain aspect to target? We used to be able
> to put birds (missiles) in a pickle barrel from a very long distance
> away before GPS became the mainstay. These flights had to compensate
> for earth rotation, atmospheric striations, elevation differences, and a
> host of other factors.
>
> Some ships have very small yagis for VHF/UHF work, but I think it is
> more a matter of environmental survival. A vertical can be quickly
> withdrawn and seated in a tube or dropped to secure to withstand the
> weather or a blast. I remember some of our in ground mounted back up
> verticals were in tubes underground and were launched with a small
> explosive charge. This was in the event all antennas were downed by a
> blast.
>
> With modern GPS systems, I expect it is a piece of cake to know exactly
> where you are.
>
> Military memories of an other time.
>
>
> Jon Hamlet, W4ZW
> Casey Key Island, FL
>
> "A little bit of Paradise in the Gulf of Mexico"
>
>
>
>
>
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