The in hull transducer on my boat works great. It's just slapped on
the inside of a fairly thick hull.

I can't imagine putting a hole in a hull if you don't need to.

--

Roger Long



"Don White" wrote in message
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Roger Long wrote:
Does anyone have any direct experience with how well 5200 sticks to
old but cleaned up fiberglass?

I have to put a new backing block in for a through hull in a very
awkward location. Since it’s a Signet Knotlog, it has to be flush
and there isn’t much back up in the taper for a direct hit on some
floating object. I’d like the back up block to be actually backing
it up.

Building up with fiberglass and epoxy working through a hand sized
opening is going to be tough. I’m wondering if a larger than normal
sized plywood backing block done with 5200 might not be nearly as
strong.



Talking about putting holes in your hull.
I'm trying to decide if I should buy a thru hull transducer.. or an
in-hull transducer for a depth sounder.
If I could feel sure that accuracy is similar, the in-hull might be
better for a trailerable sailboat...re all that loading & unloading
over rollers/bunks (& occasional beaching).