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Old 03 May 2007, 07:48   #11
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Here ends the physics lesson
I would hope that the manufacturers of these things figured this all out and so if we mount these things "properly" (i.e. vertically, which is the only I can mount mine, then that would be fine...)

As I mentioned in my post, having been "pinged" by friends, there is no doubt that these things work. Considering the low cost, it seems that these should be standard gear on a RIB...
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Old 03 May 2007, 09:39   #12
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I would hope that the manufacturers of these things figured this all out and so if we mount these things "properly" (i.e. vertically, which is the only I can mount mine, then that would be fine...)

As I mentioned in my post, having been "pinged" by friends, there is no doubt that these things work. Considering the low cost, it seems that these should be standard gear on a RIB...
Well that kind of depends upon the type. The biggest problem occurs with the more budget end of the reflector market (see picture below). If used as seen in the picture, with one corner uppermost, this will not work very well. Sadly this is exactly how I've seen many reflectors aligned (particularly on mast heads). In order for this reflector to work well it needs three black corners uppermost in the "catch rain" position i.e. lent at 45 degrees to its pictured orientation

Now I've not opened up one of the encased reflectors (something like an Echomax EM230) but I suspect that they contain a stack of smaller reflectors all in the correct orientation. Certainly based upon their reported performance this would seem to be the case.

However my reason for the initial post was to alert users of the simple uncased type of reflector that its alignment is critical to its functionality.

HTH

Andrew
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Old 03 May 2007, 09:42   #13
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It gets a lot more complicated than that. The length of time the pulse is visible makes a hell of a difference. For example you can have a reflector that does well in some tests but the return is just a brief spike. It's a bit like someone flashing a bright laser once every 20 seconds - it may be bright but the chances of seeing it are slim. On the other hand someone with a dim torch that flashes for 20 seconds at a time has a much better chance of being picked up.

I have read many radar reflector reviews and the tube type are probably the worst performer. The octhedral is pretty good but difficult to mount. The echomax is very good as is the trilens but I would say the trilens is the ultimate for a RIB as it's so easy to mount and a lot less obtrusive than the dustbin echomax.

The ultimate is the seeme which is an active design but not cheap!!!
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Old 03 May 2007, 09:46   #14
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The ultimate is the seeme which is an active design but not cheap!!! [/QUOTE]

However when you talk to Mike Deacon of Hot Lemon and GJ at Scorpion they say that the Sea Me is a nightmare that is unreliable and not suited to the application on a RIB. Maybe we should all wear suits of armour?

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Old 03 May 2007, 10:36   #15
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we carry them to cover m'back in case of an incident but I doubt the tubular ones do a lot. The advice has always been to mount the traditional reflectors in the catch rain position but I wonder what position it ends up in when a sailing boat is heeled hard over-mind you probably not foggy then but still a difficult thing to spot visually. Worrying thing in the fog we have encountered over the last couple of years is that we have never heard a fog sound signal from the big boys and they are still doing the daily passage at full speed despite the visibility, or complete lack of it!
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Old 03 May 2007, 11:10   #16
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Originally Posted by qcamel View Post
The ultimate is the seeme which is an active design but not cheap!!!
However when you talk to Mike Deacon of Hot Lemon and GJ at Scorpion they say that the Sea Me is a nightmare that is unreliable and not suited to the application on a RIB. Maybe we should all wear suits of armour?

Ollie [/QUOTE]

Ollie, do you know the reasons behind Mike and Graham's views - I'm thinking of shelling out for a Seame for a Targa 37 so any feedback would be useful..
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Old 03 May 2007, 11:15   #17
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However when you talk to Mike Deacon of Hot Lemon and GJ at Scorpion they say that the Sea Me is a nightmare that is unreliable and not suited to the application on a RIB. Maybe we should all wear suits of armour?

Ollie
Ollie, do you know the reasons behind Mike and Graham's views - I'm thinking of shelling out for a Seame for a Targa 37 so any feedback would be useful.. [/QUOTE]

Not too much detail other than I asked Graham about one when I built my boat last year and he said that they have had nothing but problems with the one on Hot Lemon, on that basis he said he would rather not install another. Mike confirmed that but beyond those comments I know little else, sorry.
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Old 03 May 2007, 11:18   #18
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So you're only talking about one unit on one particular boat?
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Old 03 May 2007, 12:33   #19
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So you're only talking about one unit on one particular boat?
Well I am talking about the experiance of one manufacturer and their experiance with one boat that I am aware of and also the experiance of the owner of that boat and unit. It was enough to make me keep my money in my pocket but please dont let that cloud your opinion.
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Old 03 May 2007, 14:19   #20
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...please dont let that cloud your opinion.


Ollie, I've got one and it's been on my boat for 3 years. From my end it's fine but I'm not the one looking at it on a radar screen.
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