Economy minded depth and speed instruments - Page 2 - SailNet Community
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post #11 of 21 Old 04-17-2009
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post #12 of 21 Old 04-17-2009 Thread Starter
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If it was a through hull 'ducer I'd buy it, however its transom mounted and probably not the best placement for keel boats

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post #13 of 21 Old 04-17-2009
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Quote:
Originally Posted by donhaller View Post
If it was a through hull 'ducer I'd buy it, however its transom mounted and probably not the best placement for keel boats
Oh there are several listed, and I did see one with the through hull "triducer." The triducer gives you speed, temp and depth. If you don't use the triducer, you'll need two transducers, a log (speed and temp) and a depth.

Do a search for "Comnav" there are several well priced options available.
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post #14 of 21 Old 04-17-2009
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It's not best.

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If it was a through hull 'ducer I'd buy it, however its transom mounted and probably not the best placement for keel boats
I have used them. I had a Stiletto Catamaran, very light, and was not about to drill a hole. The hull is cored. The transom mount units work, with some notes:

* placement and angle is critical. Someplace where the flow is smooth.
* expect problems in chop and at speed. Mine would not work past about 9 knots (!). Actually, any time air is getting under the hull.

Of course, at slow speeds they work well, and that is when it was most usfull - anchoring.

It was a fair choice for that boat, but I wouldn't use it on yours, I think.

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post #15 of 21 Old 04-18-2009
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Value of speed meter

While it is true that GPS will give you more accurate Velocity over Ground, sometimes you want to know what the speed over water is. Depends on your use of the boat, preferences, and willingness to spend the money.

The speed over water gives you a better feel for how you are sailing the boat, as opposed to how much distance you are making. You can really focus on changes to speed even if you are fighting a current.

Just a matter of preferences.
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post #16 of 21 Old 04-19-2009
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I use my GPS for speed and a cheap fish finder (Eagle)for depth. It's also good to tell me what the bottom is like when I want to anchor. I think that I paid around $85 for the depth finder. I siliconed the transducer right to the hull no problems in three years. Did the same on my last boat.
As for the speed, my hand held GPS is accurate and has a large readout. I paid less than $100 for the GPS on ebay, so for under $200, I'm set.
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post #17 of 21 Old 04-19-2009 Thread Starter
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Just curious, those of you using fish finders on tiller steering boats (20-30'), where are you mounting the fish finder display?

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post #18 of 21 Old 04-19-2009 Thread Starter
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I had another development while snooping around for a place to locate a transducer and found that my boat already has a thru-hull transducer and fairing mounted. All I will have to do is find another display that will work with it. This makes half the job a price easier to deal with.

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post #19 of 21 Old 04-19-2009
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mounting

On my second boat, I mounted it on a board that flipped out into the companionway when I was sailing. It folded back in when I needed to go below or was back at the dock. I'll try to post a Pic when I can figure out how.
Dave
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post #20 of 21 Old 04-19-2009
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You're a bit confused I think... we're mainly talking about how to mount the transducer, whether it can be transom mounted, shoot through the hull or if it needs to be mounted through-the-hull.

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On my second boat, I mounted it on a board that flipped out into the companionway when I was sailing. It folded back in when I needed to go below or was back at the dock. I'll try to post a Pic when I can figure out how.
Dave

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