NC 895 TRANSDUCERS

[idefixsc]

I have seen many posts regarding where to place through hull traducers.

I fitted my boat with a pair of Raymarine 3D RV200.

The manufacturer recommends to place the port and starboard transducers as close to the keel as possible.

The only logical place was to fit them close to the transom, which is by the way NOT balsa free, unlike seen on some posts.

In order to do a proper installation, you will need to drill with a hole saw a larger diameter than the transducer shank (slightly bigger than the diameter of the lock nut), and though the first layer of laminate BUT NOT the second layer in order to remove the balsa.

Then fill the create cavity with resin, apply a large patch of 3 layers of mat and 2 layers of triaxial in sandwich like to create a very strong laminate to offer a solid surface where you can really wrench the lock nut without risking crushing the balsa, and drill the final cut out with the hole saw (the right dimension this time) all the way through.

Finish with web-coat for esthetic and you are done.

The likelihood of water making its way to the balsa is close to none.

Laminate sandwich

[Gio]

Interesting finding.

Consider that the original Jeanneau installation has a in-hull transducer and it can only work if there is no balsa between the sensor and the water otherwise does not work.

For example i installed a in-hull transducer too close to the transom and it seems to work properly, i think i found a place without wood inside.