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Old 03-26-2011, 07:05 AM   #41
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RE: Depth Sounders

What was the question?

Oh yea, depth sounder.

"My other depth finder is a garmin and I used a airmar transducer the comes with a cup that you attach to the hull. You can adjust it for the angle of the hull, fill it with mineral oil and put the transducer in it. Works great and it has been there for many years."

I have installed three of these in three different boats and they work great. They recommend non toxic antifreeze now, not mineral oil, but either will do just fine.

I guess my hull is about an inch thick where the transducer is mounted and it works just fine. Actually, I was testing the mounting area so I just coated the bottom of the transducer with KY jelly and set it on the hull with a sandbag to hold it in place. By the time I got around to testing in deeper water and at speed, I had misplaced the cup and the rest of the parts. It's still in "test" mode after about two years. One of these days, I'll order the parts and install it permanently.

As for reading depths, all I really care about is, Is the water deep enough to run the boat and shallow enough to anchor it?
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Old 03-27-2011, 04:05 AM   #42
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RE: Depth Sounders

As for reading depths, all I really care about is, Is the water deep enough to run the boat and shallow enough to anchor it?


Contour Nav is a fine system , esp if you have a paper recorder, for when the GPS is down.
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Old 03-27-2011, 05:45 PM   #43
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RE: Depth Sounders

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FF wrote:
As for reading depths, all I really care about is, Is the water deep enough to run the boat and shallow enough to anchor it?


Contour Nav is a fine system , esp if you have a paper recorder, for when the GPS is down.
*

*Although you wouldn't have as much history as a paper recorder (which was very nice in its day, if rare on recreation vessels), would not a modern DS with a few minutes of depth history give you a reasonable amount of info for contour navigation?
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Old 03-28-2011, 04:37 AM   #44
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RE: Depth Sounders

"would not a modern DS with a few minutes of depth history give you a reasonable amount of info for contour navigation?"

You are approaching a shore near the continental shelf.It would be nice to know WHEN you crossed the line. A LOP.

Simply knowing you are still in deep water or not ,,is little navigation help.

Many on shelf areas are very flat , so simply knowing the current depth is almost useless in creating a LOP..
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Old 03-28-2011, 06:44 AM   #45
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RE: Depth Sounders

Better and simpler approach nowadays surely is a back up GPS (even small hand-held), and be sure, not just fairly sure, where one is. Depth contours only tell you where you might be at some point parallel to the shore - depending on correct tide information being on hand for that spot as well - not where you are in relation to the shore exactly, unless you already know, in which case there is no drama anyway. Trying to match chart contours from paper or plotter if really worried about where you are is just too much stress.
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Old 03-29-2011, 12:00 AM   #46
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RE: Depth Sounders

As I spend a lot of my time fishing and diving a depth sounder/fish finder is extremely important.
I run a duel frequency Furuno FCV 585 and previously an Echotec 1000 watt.
In changing the sounders I did not have to change the transducers 50 & 200 Hz seperate transducers so it was a pretty simple change over.

GPS units are pretty cheap these days so I run 2 mast mounted units , carry a handheld in my escape bag and have a USB unit that can be used in my lap top if required.
But if the whole system shuts down then it's back to paper.

Benn
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Old 03-29-2011, 04:58 AM   #47
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RE: Depth Sounders

"Better and simpler approach nowadays surely is a back up GPS"

Great idea , until the GPS system is put out of service.

Probably for 1/2 a decade.

North Korea already has the ability , as do other more rational Nations.

Belt and suspenders may be more work than push button ,

but having it aboard is like a life preserver or fire extinguisher, Prudent.
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Old 03-29-2011, 05:15 AM   #48
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RE: Depth Sounders

Point I was trying to make is that you can overdo the "what if" scenario to the point you are virtually paralyzed like a possum in the headlights from fear of not having enough back-up because "what if", and many therefore never really get out there and relax and enjoy the trip as much as they might, and some of the views one sees on this forum sometimes tend to feed that fear.
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Old 03-29-2011, 09:59 AM   #49
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RE: Depth Sounders

Quote:
Peter B wrote:
..... you can overdo the "what if" scenario to the point you are virtually paralyzed ....of not having enough back-up because "what if"....and some of the views one sees on this forum sometimes tend to feed that fear.
* * * * Couldn't agree more! I suffered from this malady years ago before I diagnosed it and found the cure. What's the cure? Suck it up and get out there! (With the obvious pre-cruise preparations, of course.)

*
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Old 03-31-2011, 04:50 AM   #50
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RE: Depth Sounders

(With the obvious pre-cruise preparations, of course.)

The simplest pre cruise precaution is to simply select gear that could be used in an emergency.

If one is going to knock a hole in the bottom for a depth sounder , why NOT a unit that might someday be handy for navigation?

Any small radio with a AM coil antenna will work for RDF (roughly), is it unwise to have one aboard?

Taking the bottom, a stout marked pole can both measure where the water is deeper , and help push off.

Painting the vessels depth , or 1 ft stripes on a pole should not cost that much that another year will be required before tossing the power hose.
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Old 04-04-2011, 10:15 PM   #51
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RE: Depth Sounders

I am thinking about putting a sounder in the stern of our Krogen. I have used a hand held depth sounder when anchoring and stern tying . Any one done this? I would stick a transducer inside vice drill a hole.
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Old 04-05-2011, 05:10 AM   #52
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RE: Depth Sounders

You can't put a transducer inside a*cored hull, and unless they've changed, all Krogen's have Airex (or approved equal) coring.
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Old 04-05-2011, 07:05 AM   #53
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RE: Depth Sounders

Keith is right about cored hulls and shooting thru the hull transducers.* However, the 42 Krogens stopped coring below the water line some time around 1993.*
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Old 04-05-2011, 10:47 AM   #54
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RE: Depth Sounders

Quote:
superdiver wrote:
My only depth sounder is in the lower cabin, is it possible or hard to tie in another depth sounder to the existing one for the fly bridge? Or is it better to make a redundant system to put on the fly bridge?
********* You can often use two simular depthfinders on one transducer.* A selector switch is required because you can only use one at a time.* An example is the Lowrance switch in the image.

JohnP

*
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Old 04-05-2011, 11:19 AM   #55
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RE: Depth Sounders

Quote:
superdiver wrote:
My only depth sounder is in the lower cabin, is it possible or hard to tie in another depth sounder to the existing one for the fly bridge? Or is it better to make a redundant system to put on the fly bridge?

*

How old is the unit at*the lower helm?* It might be the time to upgrade with newer technology on the fly bridge.* We added*a Lowrance HDS-5x broad band*unit to the fly bridge.* The quality is comparable to commercial units that use to cost several thousand dollars.* On line the unit was less than $500.00 (minus transducer).
*
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Old 04-05-2011, 02:39 PM   #56
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RE: Depth Sounders

We do have a solid hull below water line. Superdiver, we have 2 depth indicators running from 1 thru hull transducer. Autohelm (now Raymarine ) ST60s. no selector switch required. Both on at once.
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