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Radar mounting question

Old 09-29-2014, 07:52 PM
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Default Radar mounting question

When you mount a Radome, should it be above any other Ttop items like a spotlight or antenatal bracket or GPS antenna? Will these things effect the radar beam and it's ability to'see'? ;?
Old 09-30-2014, 12:49 AM
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Hello. I can´t remember the exact specs, but there are dos and dont´s regarding radar mounting, both in terms of proximity to other antennas and angle of mounting the radome. Nigel Calder´s book has a paragraph about it. If you have a look on the Furuno or Raymarine website, download one of the installation manuals, there is usually something about this too. Hope this helps.
Old 09-30-2014, 07:28 AM
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I would post a quick pick and we can really help a ton. But without a pic, people will just quote manufacturers recommendations.
Old 09-30-2014, 08:27 AM
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I am not an expert, but I would say no, you do not need to avoid these things. I have mounted 2 radars on my boats, and they are on the same level as all the other device antennas. I also fish on a boat that has a tower, and the radar is on the t-top, and below the second station. the only thing i would note, is that the radar would "kill" a tv antenna, if you have one on your boat. most dont, but I actually asked my installer this question, as I wanted to add satellite tv to my boat.
my dome was on my t-top , next to satelitte radio, gps antenna, out riggers, etc.
Old 09-30-2014, 12:41 PM
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Need to see a picture, just remember most all of the domes have a 25 degree angle beam and yes certain things will impede it's performance but really we should have a picture for better advice.
Old 10-01-2014, 08:18 PM
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Thanks for the answers. No pictures because I haven't mounted it. Trying to plan ahead a bit to lessen future problems. Right now I only have a VHF antenna and XM weather (small) dome. But I want to add a spotlight as we'll as the radar.
Old 10-02-2014, 07:17 AM
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I have a few antennas, no issues with this radar mount.

fiberglass antenna and poles are mostly invisible to radar. Metal mounts on the boat, even though they MIGHT create a blind spot, will not show on the radar as they are too close to register. If I had a spotlight, I'd try to mount the radar above it, since the last place you want a blind spot is dead ahead. If you mount the spotlight off to the side, it's less of an issue. There are relatively inexpensive mounts that can raise the radome up. Look on ebay for scanstrut or similar.
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Last edited by Buoy Scout; 10-02-2014 at 10:49 AM.
Old 10-02-2014, 04:27 PM
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I have a spot light directly in front of my dome with no problems.
Old 10-02-2014, 07:17 PM
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ant poles ok. spot light no, same with ant domes etc. not only will they block, but the radar will damage.
Old 10-03-2014, 07:24 AM
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I think the biggest concern other than things blocking the signal, that most people forget (or don't know about) is the width of the surface that the dome is being mounted to, this can really limit the capabilities of the Scanner. I know a few boaters that were more concerned with looks rather than function and didn't want a 5" mount because of the way it was going to look on their boat and their radar signal is very limited in capabilities and range. If you haven't seen this here's a page from the Simrad Installation Instructions. I wouldn't worry about antennas or antenna mounts, anchor lights as much as I would to make sure your 25 degree beam has as much clearance from your top (if applicable) so you can retain as much of the signal as possible. Check out page 8 & 9...if you want
http://www.simrad-yachting.com/Root/...3-003_EN_P.pdf
Old 10-04-2014, 08:44 AM
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Originally Posted by smac999 View Post
ant poles ok. spot light no, same with ant domes etc. not only will they block, but the radar will damage.
I didn't consider damage from the radar. That's a good point. Thanks.
Old 10-04-2014, 09:37 AM
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Originally Posted by mahimahi99 View Post
I think the biggest concern other than things blocking the signal, that most people forget (or don't know about) is the width of the surface that the dome is being mounted to, this can really limit the capabilities of the Scanner. I know a few boaters that were more concerned with looks rather than function and didn't want a 5" mount because of the way it was going to look on their boat and their radar signal is very limited in capabilities and range. If you haven't seen this here's a page from the Simrad Installation Instructions. I wouldn't worry about antennas or antenna mounts, anchor lights as much as I would to make sure your 25 degree beam has as much clearance from your top (if applicable) so you can retain as much of the signal as possible. Check out page 8 & 9...if you want
http://www.simrad-yachting.com/Root/...3-003_EN_P.pdf
Thanks. I believe I'll get an elevated mount.
Old 10-05-2014, 07:21 AM
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Here are some pics of my top. After looking at a million different mounts I thought I would ask for some suggestions. Trying to KISS on the mount. As you can see I have a VHF antenna, an XM weather antenna and a nav light. I want to add the radar dome on an elivated mount and a remote control spot light. Any suggestions will be greatly appreciated.

Last edited by BRN1; 10-05-2014 at 07:39 AM.
Old 10-05-2014, 07:22 AM
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Ok the pics didn't work! I'll try again.
Old 10-05-2014, 07:38 AM
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[IMG][/IMG][IMG][/IMG]
[IMG][/IMG]
I think I got it to work this time!
Old 10-05-2014, 07:52 AM
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More info. in this thread:

http://www.thehulltruth.com/marine-e...-small-cc.html

Do not put the spotlight on top of your hardtop. Too much glare. Instead mount it on the bow.
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Old 10-05-2014, 09:10 AM
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My boat a 2014 SeaHunt Gamefish 25. Does anyone think I need a 2 or 4 degree wedge for the mount? Or no wedge?

Last edited by BRN1; 10-06-2014 at 09:01 PM.
Old 10-05-2014, 09:12 AM
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Originally Posted by HeadHunt View Post
More info. in this thread:

http://www.thehulltruth.com/marine-e...-small-cc.html

Do not put the spotlight on top of your hardtop. Too much glare. Instead mount it on the bow.
If the spot is mounted on top a couple of feet from front edge, will that reduce the glare?
Old 10-05-2014, 09:13 AM
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Originally Posted by BRN1 View Post
If the spot is mounted on top a couple of feet from front edge, will that reduce the glare?
no
Old 10-09-2014, 03:55 PM
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I may be a little late to the discussion, but BattleWagon has a couple of good pages to help with these questions. They have a template of a 25 degree beamwidth you can download and use on the boat itself. I believe they also have some information on deciding whether you need a mount with a down angle or not.

www.battlewagonmounts.com

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