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Old 14-11-2017, 12:42   #1
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Deadrise angle

Hi
I own a 1978 Islander 36 and I want to install a RV transducer.
To know what transducer is the best I need to know the deadrise angle of my boat.
I tried to research the information but I couldn't find it.
Someone have the knowledge or where I can search to get that?
Thanks
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Old 14-11-2017, 15:16   #2
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Re: Deadrise angle

What is "a RV transducer"?

Jim
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Old 14-11-2017, 15:26   #3
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Re: Deadrise angle

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Originally Posted by Jim Cate View Post
What is "a RV transducer"?

Jim
isnt it the camera you have on the back of your recreational vehical for parking......what i would like to know is what is "dead rise"
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Old 14-11-2017, 15:41   #4
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Re: Deadrise angle

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What is "a RV transducer"?

Jim
Hi Jim

An RV transducer is a "Real Vision 3D Depth Transducer to connect to a Axiom Chartplotter"
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Old 14-11-2017, 15:47   #5
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Re: Deadrise angle

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isnt it the camera you have on the back of your recreational vehical for parking......what i would like to know is what is "dead rise"
Deadrise is a measurement of the degree of angle between two surfaces. A boat's deadrise is the amount of angle that forms between the boat bottom and a horizontal plane on either side of center keel. (Google search)
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Old 14-11-2017, 15:58   #6
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Re: Deadrise angle

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Deadrise is a measurement of the degree of angle between two surfaces. A boat's deadrise is the amount of angle that forms between the boat bottom and a horizontal plane on either side of center keel. (Google search)
with a protractor you can probably work out the angle from the plans in the link

ISLANDER 36 sailboat specifications and details on sailboatdata.com
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Old 14-11-2017, 16:04   #7
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Re: Deadrise angle

Deadrise will vary depending on your transducer location, so it's less about your boat and more about where you choose to install (but of course you will be limited by region of your hull closest to parallel with the surface of the water).
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Old 14-11-2017, 16:08   #8
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Re: Deadrise angle

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with a protractor you can probably work out the angle from the plans in the link

ISLANDER 36 sailboat specifications and details on sailboatdata.com
The boat is in the water And I prefer to get the knowledge without going under the boat.

I had already checked the website with the Islander specifications and there is no the information I need.
Thanks anyway
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Old 14-11-2017, 16:17   #9
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Re: Deadrise angle

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Deadrise will vary depending on your transducer location, so it's less about your boat and more about where you choose to install (but of course you will be limited by region of your hull closest to parallel with the surface of the water).
You right, but the transducers come in 3 different types, from 0 to 6 degrees, from 6 to12 degrees and from 12 to 20 degrees depending on the deadrise of the boat. There is a margin of error to be considered.
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Old 14-11-2017, 16:20   #10
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Re: Deadrise angle

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The boat is in the water And I prefer to get the knowledge without going under the boat.

I had already checked the website with the Islander specifications and there is no the information I need.
Thanks anyway
you might be over thinking this,as i assume you will be fitting the transducer in a boatyard, out of the water.

you can make a suitable beveled block or use fairing compound and fiberglass to build a platform that is horizontal to the waterline ,best left till in the boat yard when angles and curves will be obvious
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Old 14-11-2017, 16:21   #11
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Re: Deadrise angle

Measure from the inside.
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Old 14-11-2017, 16:24   #12
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Re: Deadrise angle

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Measure from the inside.
LOL I wasn't thinking about that.
Thank you very much.
Problem resolved
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Old 14-11-2017, 16:26   #13
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Re: Deadrise angle

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You right, but the transducers come in 3 different types, from 0 to 6 degrees, from 6 to12 degrees and from 12 to 20 degrees depending on the deadrise of the boat. There is a margin of error to be considered.
Are you replacing an existing transducer or installing a new one? I definitely realized too late that (after I bought a bundle) I would be unable to swap an old log-speedo with a combined speed/depth/temp due to deadrise at installation location. Sure enough, when on one tack the sounder would have shot practically at the horizon.

There are tricks you can do to rectify the angle mismatch, creating a fairing below your boat, or a wetbox inside filled with glycerine or other (assuming the hull is solid and not cored).
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Old 14-11-2017, 16:44   #14
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Re: Deadrise angle

[QUOTE=Guess52;2518497]Are you replacing an existing transducer or installing a new one?

I Installing a new one. I didn't buy the transducer yet. I like to complete my research before that.
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