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From: (no name) (no email)
Date: Fri Jun 29 2007 - 21:59:50 EDT
Rafael --
The bottom of the lower edge of the open array (the array itself, not the motor housing) is about 2+ feet?above the roof of the pilothouse so in total, the bottom of the open array is about 3 feet above the head of a 6 foot tall person standing in the pilothouse.? When either radar is operating, no one is allowed on either the foredeck or on the upper deck to avoid people being within the radar beam.? It is my understanding that the issue with exposure to the radar beam is an issue of being in the area affected by the transmitted beam which I understand to be a 360 degree plane centered on the magnetron.? Obviously, "plane" is an over simplification as the beam both rises and sinks from a true plane.? I have never heard that there was an issue with a radar unit above one's head but we are very careful to stay out of the beam of the transmitter.
I assume that others that may know more will chime in on this question.
Jim
(Jim & Mim McCrea, Nordic Tug 37-134 "North Star" Home Port Essex, CT)
-----Original Message-----
From: Rafael Ongpin <>
To:
Sent: Fri, 29 Jun 2007 9:38 pm
Subject: Re: T&T: Dual Radar
I have two questions: How high is the lowest radar unit from the roof of the
pilothouse, and approximately what would you say is the minimum safe
distance from the radar to the heads of people standing inside the
pilothouse?
Thanks
Rafael
On 6/30/07 9:00 AM, "" <> wrote:
> Thos.
>
> I am running two radar units simultaneously.? I run one on short range and one
> on a longer range.? Both are 4kw Furuno units, one an open array and the other
> a radome.? They are both mounted on a custom mast that I had built for the top
> of our pilothouse.? The units are one over the top of the other with the open
> array being the lower unit.? They have worked very well and I have not had the
> slightest indication that I am having any interference between the units.? If
> I were setting this boat up again, I would do it exactly the same way as this
> set up has worked extremely well.? If you have any specific questions, feel
> free to drop me a note off line.
>
> Jim
>
> (Jim & Mim McCrea, Nordic Tug 37-134 "North Star" Home Port
> Essex, CT)
>
>
> -----Original Message-----
> From: Tom Penner <>
> To:
> Sent: Thu, 28 Jun 2007 11:07 pm
> Subject: T&T: Dual Radar
>
>
>
> List;
>
> I am trying to find information on mounting dual radars, in
> particular separation between the two antennae. I just bought a Garmin
> GMR41 and I have a Nobeltec 4.5' 4kw open array already installed. I
> just ordered the IR2 upgrade for the Nobeltec and I will be taking down
> the mast for inspection and to install the new radar as well as a bunch
> of smaller antennae. I am coming up scratch on how to mount them so they
> will not interfere with each other (if they even will) It will take some
> time to fabricate a mount and unstepping my radar mast is going to be a
> PITA, so I would like to at least THINK I know what I'm doing before I
> start!
>
>
>
> Any help would be appreciated.
>
>
>
> Thanks,
>
> Thos.
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