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Old 01-16-2012, 11:37 PM   #41
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RE: Locating one's radar antenna

My radar view from home berth:

*
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Old 01-17-2012, 03:53 AM   #42
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RE: Locating one's radar antenna

The newest style radar has 1/100 the output , some claim 1/10 of what a cellphone blasts into your grey matter.

Should make the instaliation decision process easier.
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Old 01-17-2012, 02:12 PM   #43
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RE: Locating one's radar antenna

Quote:
markpierce wrote:
My radar view from home berth:

*
*Looks just like ours albeit a wee bit fuzzier.
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Old 01-17-2012, 03:17 PM   #44
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RE: Locating one's radar antenna

Mark, would it change the picture if you were to turn the gain down a few percentage points?* Doing so might "sharpen" the image.
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Old 01-17-2012, 06:14 PM   #45
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RE: Locating one's radar antenna

Ray, I haven't changed the gain yet and should fiddle with it.
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Old 01-17-2012, 08:49 PM   #46
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RE: Locating one's radar antenna

Quote:
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Mark, would it change the picture if you were to turn the gain down a few percentage points?* Doing so might "sharpen" the image.
******* I agree!
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Old 01-18-2012, 03:00 AM   #47
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RE: Locating one's radar antenna

Yes, broadband radar should be sharper than than - I know this and I don't even have one - yet. But I've purved at them enough to know...
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Old 01-19-2012, 05:49 AM   #48
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Locating one's radar antenna

Here is one that hangs from a mast, which is easy enough to do on most boats.

[img]../../download.spark?ID=1066634&aBID=115492[/img]

They can be seen quite well.* $48.00 from Defender.

I can see no reason to hide it.* If one feels that it is unattractive then spend $150 for this one. Also form Defender.

[img]../../download.spark?ID=1066655&aBID=115492[/img]


-- Edited by JD on Thursday 19th of January 2012 06:50:25 AM
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Old 01-19-2012, 05:57 AM   #49
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RE: Locating one's radar antenna

Quote:
charles wrote:
Related issue: Has anyone given thought to "A" location for a radar reflector?
I mounted mine INSIDE the flying bridge enclosure. Out of the way and out of site. Simply had no other place to put it.
*For those that haven't bought one yet...you can line the inside of your flybridge enclosure with tin foil...the more crinkles the better.

*
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Old 01-19-2012, 06:32 AM   #50
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Locating one's radar antenna

Quote:
psneeld wrote:charles wrote:
Related issue: Has anyone given thought to "A" location for a radar reflector?
I mounted mine INSIDE the flying bridge enclosure. Out of the way and out of site. Simply had no other place to put it.
*For those that haven't bought one yet...you can line the inside of your flybridge enclosure with tin foil...the more crinkles the better.
*

What does that do for your TV reception if your TV*antenna that is under the bridge enclosure?*

*


-- Edited by JD on Thursday 19th of January 2012 07:33:18 AM
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Old 01-19-2012, 08:11 AM   #51
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RE: Locating one's radar antenna

not sure...I don't know what the*new digital TV signals are..my guess not good...so then spring for the reflector.* Just passing along a cheapo but effective tip.
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Old 01-19-2012, 07:00 PM   #52
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RE: Locating one's radar antenna

Quote:
JD wrote:What does that do for your TV reception if your TV*antenna that is under the bridge enclosure?*
*-- Edited by JD on Thursday 19th of January 2012 07:33:18 AM

*Here you go, JD.* Increase your radar signature, improve your TV reception and protect yourself from man-caused global warming theorists all at the same time. ;-)

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Old 01-19-2012, 10:00 PM   #53
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RE: Locating one's radar antenna

Quote:
FlyWright wrote:JD wrote:What does that do for your TV reception if your TV*antenna that is under the bridge enclosure?*
*-- Edited by JD on Thursday 19th of January 2012 07:33:18 AM

*Here you go, JD.* Increase your radar signature, improve your TV reception and protect yourself from man-caused global warming theorists all at the same time. ;-)



*Does that work if I have a 23 year old blonde with large .... Oh forget it I'll just watch TV off of the cable.
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Old 01-20-2012, 08:50 AM   #54
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Locating one's radar antenna

Quote:
charles wrote:
Related issue: Has anyone given thought to "A" location for a radar reflector?
I mounted mine INSIDE the flying bridge enclosure. Out of the way and out of site. Simply had no other place to put it.
*Mine is "mounted" under one of the flybridge seats. My boat "prints" as good as one with*a reflector mounted high (at shorter distances) according to a friend.

I learned this by being passed once by two boats from out marina that were running side by side. One was my slip neighbor and I knew his relfector was mounted inside the flybrdge. His buddy had the identical reflector (davis aluminum) and I thought he had monuted it, but it was actually still under his helm seat and he had an express cruiser. Anyway, the two boats had the identical print on my radar screen...from when they passed me until they were out of site, maybe 2 miles away (then they turned into a harbor and I lost them).

*

*


-- Edited by jleonard on Friday 20th of January 2012 09:51:43 AM
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Old 01-20-2012, 09:00 AM   #55
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RE: Locating one's radar antenna

I jut picked up a used "Blipper" reflector, and was debating where to mount it. Part of me has thought of mounting it on the rear of one of the dock boxes mounted on top of my aft deck (see picture). My logic is that I have poor rear ward visibility and I move slow - so my fears are of being run down by a faster vessel overtaking me. So mounting the blipper high and aft might give me a better signature for vessels approaching from behind (but I think still give me 360' of decent reflection).

Thoughts?
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Old 01-20-2012, 09:49 AM   #56
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RE: Locating one's radar antenna

CCGA regs require boats like ours to be equipped with a radar reflector, and if operated in a busy area (such as Vancouver Harbour, or going under Lions Gate Bridge) to have the reflector deployed properly. No definitions are given to assist with deployment. Under the flybridge will work, as the radar can see through the FG material as if it wasn't there.

On a trip in company with 5 other boats (all compatible speed) in fog, we received a report from a passing fishboat, who commented on the strength of his return from each of us. As you might expect, the reflectors that looked like they should be best, were in fact the best. Those mounted up high lasted to the greatest distance.

As we pass, or are passed by others, I frequently report the strength of the return to the other boater. That often results in a conversation about the kind of reflector, its location, etc. From this I am happy with any metal reflector, mounted in the "rain catch" position, as high as possible. foil covered cardboard is the worst. Those tall, 3" dia cylindrical reflectors are good bang for the buck. Best is what you see on top of Nav bouys.
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Old 01-20-2012, 11:08 AM   #57
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Locating one's radar antenna

Quote:
charles wrote:
Related issue: Has anyone given thought to "A" location for a radar reflector?

*We use the round, multi-plane reflector illustrated in an earlier post and it't mounted on the port mast stay which puts it more or less in the best position (according to the instructions) for reflecting a good target to a radar.


-- Edited by Marin on Friday 20th of January 2012 12:14:00 PM
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Old 01-20-2012, 02:05 PM   #58
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RE: Locating one's radar antenna

We have our drum-shaped reflector near the top of the mast.
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Old 01-20-2012, 03:47 PM   #59
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RE: Locating one's radar antenna

Quote:
koliver wrote:
CCGA regs require boats like ours to be equipped with a radar reflector, and if operated in a busy area (such as Vancouver Harbour, or going under Lions Gate Bridge) to have the reflector deployed properly. No definitions are given to assist with deployment. Under the flybridge will work, as the radar can see through the FG material as if it wasn't there.

On a trip in company with 5 other boats (all compatible speed) in fog, we received a report from a passing fishboat, who commented on the strength of his return from each of us. As you might expect, the reflectors that looked like they should be best, were in fact the best. Those mounted up high lasted to the greatest distance.

As we pass, or are passed by others, I frequently report the strength of the return to the other boater. That often results in a conversation about the kind of reflector, its location, etc. From this I am happy with any metal reflector, mounted in the "rain catch" position, as high as possible. foil covered cardboard is the worst. Those tall, 3" dia cylindrical reflectors are good bang for the buck. Best is what you see on top of Nav bouys.
*Actually I remember a practical sailor that tested radar reflectors quite a few years ago now and the foil covered ones did just fine when in the larger sizes.* In fact, when some of the tube type first came out...they scored horribly.* Depends...like a lot of things but foil enev thin foil (not necessarily mylar covered plastic reflects radar radiation just fine.

The important thing for the complex shape ones is proper mounting/orientation.
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Old 01-20-2012, 05:24 PM   #60
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RE: Locating one's radar antenna

Quote:
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We have our drum-shaped reflector near the top of the mast.
*Ray, I've always meant to ask you what that barrel was for.
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