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Old 10 October 2010, 15:31   #11
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should be ok. Try it with silicone first - it may or not be strong enough a bond in there for permanent use but if you try it and its no good you can peel it out again. Silicone may indeed be good enough for the permanent fit. Don't mount it so its trying to sound thru the keel itself there may be other stuff in there. A tad to one side will be fine. (Thats an imperial tad not a metric one cos I'm an old git!)
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Old 10 October 2010, 16:08   #12
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I did position some years ago a transducer, sounding through the hull. Made kind of a semiclosed well, filled with ricin oil. It was fully inside the hull, nothing went through. It worked ok for years until sold the boat. The design was a direct copy of the manufacturers version( expensive) but cant remember the brand. It was essential to get the transducer in a straight vertical position.
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Old 10 October 2010, 16:32   #13
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seafarer used to market the tube and fill with oil-aint neccesary and not practical in the flooding cavity of a searider. Transducers are not difficult to put in with silicon- just get on with it and do it, if it don't work (but it will) just peel it out.
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It was essential to get the transducer in a straight vertical position.
its really not that critical
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Old 10 October 2010, 17:06   #14
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seafarer used to market the tube and fill with oil-aint neccesary and not practical in the flooding cavity of a searider. Transducers are not difficult to put in with silicon- just get on with it and do it, if it don't work (but it will) just peel it out.

its really not that critical
Yes, it was probably a seafarer. Fully agree, not a very practical solution on a SR.

Was out today and berthed for a coffee break on a shallow beach. No damages but decided two things, flooding hull has to go and need to have a depth sounder on the boat. Millions of underwater rocks here, the less draft the better.

Guess gluing a transducer with silicone before closing the hull might be a convenient way to do the installation.
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Old 11 October 2010, 08:14   #15
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silicone sucks..... sikaflex rocks...


much stronger, better adhesive capabilities, better sealing....

Silicone only belongs around your bathroom sink... or in some medical/fysiological usecases....
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Old 12 October 2010, 12:25   #16
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Guess gluing a transducer with silicone before closing the hull might be a convenient way to do the installation.
....until you need to get at it for service / replacement!
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Old 12 October 2010, 12:40   #17
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Silicone only belongs around your bathroom sink
b*ll*cks
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Old 12 October 2010, 13:03   #18
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....until you need to get at it for service / replacement!
That is also correct!

Maybe due to bad luck or condense issues(due to huge yearly temperature variations), but always seams to get water in closed double hull spaces, sooner or later, in my boats. So will either block the drain hole with a removable "flange" or then make a inspection hatch in the deck.

Don't know much about modern depth sounders, how good are they to measure the depth
in front of the boat, as that is the most needed feature for me? Is it a problem to have it close to the transom or should I fit it closer to the bow? Thanks
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Old 12 October 2010, 14:33   #19
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Don't know much about modern depth sounders, how good are they to measure the depth
in front of the boat, as that is the most needed feature for me? Is it a problem to have it close to the transom or should I fit it closer to the bow? Thanks
Too close to the bow and it won't have water to shoot into at speed. Not sure the few extra feet are going to give you whole lot of warning when the water gets skinny in any case. That does, of course depend on your rate of forward motion as well.

My ducer is mounted off the transom; I was thinking about getting a portable depth finder for those times when I am in a shallow rocky area, and have someone hand-hold it in the water off the bow.

jky
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Old 12 October 2010, 19:03   #20
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Originally Posted by C-NUMB View Post
Don't know much about modern depth sounders, how good are they to measure the depth
in front of the boat, as that is the most needed feature for me? Is it a problem to have it close to the transom or should I fit it closer to the bow? Thanks
They shoot pretty much straight down I think, but you can get forward sounders at a price, there was an article about them in RIB Intl a couple of years back, have a look at something like http://www.echopilot.com/ for an idea of what they can do.

Knowing how deep the water is behind you is always something I have regarded as of limited use when going into somewhere you are completely unfamiliar with
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