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Radar arch high enough for dingy
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journey on



Joined: 03 Mar 2005
Posts: 3593
City/Region: Valley Centre
State or Province: CA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: journey on
Photos: Journey On
PostPosted: Sun Jul 30, 2017 3:20 pm    Post subject: Reply with quote

Please remember that most gas stations have an 11 ft. canopy. If anything sticks above 11 ft., you will be gassing in the RV lane, which gets clogged. Journey On is below 11' when on the trailer. And below 8 1/2' when in the water.

Journey On is a 25' C-Dory with a forward mounted radar arch. At the time, I did not want the radar emissions going through the cabin. I feel that subjecting everyone on the boat to strong microwave emission is wrong, a personal opinion. The factory mounted it right in back of the anchor light for me, works great.

Plenty of room to slide a dinghy in, if the anchor lite is removed.

BTW, I now have a low emission radar, a Lowrance 3G, best radar I ever owned.

Boris
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thataway



Joined: 02 Nov 2003
Posts: 20778
City/Region: Pensacola
State or Province: FL
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: thataway
Photos: Thataway
PostPosted: Sun Jul 30, 2017 4:55 pm    Post subject: Reply with quote

Boris, your point is well made, but my experience is that most gas stations have a 14 foot or more hight canopy. I may be more aware than most because we often tow with the RV which is a little over 12 foot height. May be more height in Florida or when driving across the country than Calif. I find the biggest problem getting fuel when towing is the room to turn--and usually try for an outside pump if possible. Occasionally even with the truck, I'll have to back out.

It would be rare for the actual beam of the radar to be an issue when you are in the cabin--the max down beam is 15* below horizontal--and many of us have a 3 to 5* down wedge, so the beam would be 12* or less. from the center plane of the radar.

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Bob Austin
Thataway
Thataway (Ex Seaweed) 2007 25 C Dory May 2018 to Oct. 2021
Thisaway 2006 22' CDory November 2011 to May 2018
Caracal 18 140 Suzuki 2007 to present
Thataway TomCat 255 150 Suzukis June 2006 thru August 2011
C Pelican; 1992, 22 Cruiser, 2002 thru 2006
Frequent Sea; 2003 C D 25, 2007 thru 2009
KA6PKB
Home port: Pensacola FL
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journey on



Joined: 03 Mar 2005
Posts: 3593
City/Region: Valley Centre
State or Province: CA
C-Dory Year: 2005
C-Dory Model: 25 Cruiser
Vessel Name: journey on
Photos: Journey On
PostPosted: Mon Jul 31, 2017 12:40 am    Post subject: Reply with quote

Hm, Bob, I've wondered why I've seen RV's with their top ripped off. Some of the gas stations near me are about 12'. I assume others are above 13' 6". I do know that Journey On is about 11' on the trailer and it has been a close fit at times. If I had a 12' high RV, I'd check the height of any covering when I drove under it. They're usually marked. I assume that the damaged RV's were used to 14' and didn't read the sign.

A radar bean that's a foot above the cabin roof will pass through the cabin in about 4' and go downward at 15 deg. If the radar arch is installed on the rear of the cabin, the people sitting in the front of the cabin will receive some radiation, since the 15 deg is the 1/2 power point. Not much, but it integrated up and I had a choice on placement.

I understand that you use a dedicated radar mount, installed on the front of the cabin, but we were discussing radar arches.

Boris
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localboy



Joined: 30 Sep 2006
Posts: 4656
City/Region: Lake Stevens via Honolulu
State or Province: WA
C-Dory Year: 2007
C-Dory Model: 25 Cruiser
Vessel Name: 'Au Kai (Ocean Traveler)
Photos: 'AU KAI
PostPosted: Mon Jul 31, 2017 7:35 pm    Post subject: Reply with quote

Low arch installed on our 25 forced me to also install a pedestal to raise the radar over the dinghy. Works perfectly now.
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Wife to her husband pointing @ us...from the bow of their 50-footer; Prideaux Haven 2013
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