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Garmin Thru Hull Transducer Install Location Help

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Garmin Thru Hull Transducer Install Location Help

Old 04-16-2016, 09:41 PM
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Default Garmin Thru Hull Transducer Install Location Help

Guys,

I am having a Garmin GT 50 thru hull transducer installed on Wednesday. I am not sure where the best place to locate it is. It has a fairing block which we are going to cut so it points straight down. However I have a downeast style hull with a long keel and inboard straight shaft running gear. I drew on this pic of a keeled sail boat to get an idea what you guys think. The previous owner was fairly nautical/salty and had his located at "A". For this reason I may opt for "B" on the opposite side of the hull ahead of where the keel begins. (It is an area that would always be underwater)
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Old 04-16-2016, 10:37 PM
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I would say A is best, B second best and I wouldn't mount it at C or D if you don't have to. That's assuming your hull isn't a planing or semi-planning hull which it doesn't sound like it is, right?
Old 04-17-2016, 07:43 AM
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Are you installing a single... or pair of GT50 ?



If installing the single it must be at a location of less than 5 degrees dead rise.

If using the pair..then you have far greater flexibility of location....and do not have to worry so much about the keel.




Old 04-17-2016, 09:32 PM
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I am installing a single transducer. Could not afford to buy a pair. Am wiling to live with reduced side view if It comes down to it.
Old 04-17-2016, 11:20 PM
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Originally Posted by scott diego View Post
I am installing a single transducer. Could not afford to buy a pair. Am wiling to live with reduced side view if It comes down to it.
You can always add the other ducer at a later date.





.
Old 04-18-2016, 01:07 AM
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Neither...To be parallel with the bottom I would go between strakes 9 and 10. Anywhere else would require the attack angle be addressed by the cutting angles of the fairing block which would cause turbulences. You advise the fairing block would be cut to provide straight down view, but in so doing its profile is much deeper than at 9/10
The keel is a killer and semperfifishing is correct. Plan for future expansion and add a second one later.
Your drawing does not show water intakes for engine, air con, desal if fitted, so that needs addressing.
As you are having this installed by I assume a qualified shipwright, asking THT members doesn't demonstrate much confidence in your installer.
Old 04-18-2016, 08:48 AM
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And all of our suggestions are just that, since we don't have an actual picture of your hull nor are we there in person to see all of the parameters. So you should definitely hire a Certified Garmin Installer for something like this, in case you're more limited than the sailboat hull drawing above shows.
Old 04-18-2016, 09:55 AM
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Having confidence in my installer is one thing, but politely asking a forum of potentially experienced boaters to critique my understanding of location in reference to a boats keel (which the garmin instructions dont particularly address) was my intention.

Also, I found the best picture I could find that incorporated a keel, without the ability to get in the water and take decent underwater pics of the keel and boat-bottom details.

Any other opinions on location?

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