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Wed, February 05 2025, 06:46 [ Login ] [ Contact Forum Admin ] [ Main index ] [ Post a new message ] [ Search | Check update time | Archives: 1, 2, 3, 4, 5, [6], 7, 8, 9 ]

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Date Posted: - Tuesday - 02/10/09 - 1:20am
Author: Dan M32 #36 Independence
Subject: Depth sounders
In reply to: Dan M32 #36 Independence 's message, "thru hulls" on - Saturday - 02/ 7/09 - 2:47pm

I'm with you Randal in reguards to the small display size.I recently put a Humminbird sounder in my San Juan 24 and it's about 2" in dia. and it's hard to read sometimes. It replaced a 5" dia. Standard Horizon that stopped working after only 6 yrs. I wanted to replace it with one the same size but apparently all the instrument makers got together and decided it would be funny if they stopped making 5" dia. to see what people would do with all tose 5" holes in their boats. I had to make a plastic filler for the hole. I think the 2" instruments are intended to go in a dashboard like on a powerboat. Anyway the transducer is a glued in hull type. I've only used the boat a few times since installing it and I've gotten some wacky readings. The old one was a Standard Horizon with a in hull transducer that was in mineral oil and it worked great until it stopped. I was considering going to a fishfinder but they're all rectangular and not made to go in a bulkhead. Looking on line for depth sounders recently( I'm starting to research all the things I'll need for my Mariner ) I noticed there is a lot of transducers for sale w/o the instrument so I guess some must be interchangable as long as they work on the same frequency. I also noticed that some are made with the transducer at an angle in the thu hull which is good but they are expensive. One more thing while I'm venting, why do alot of the new sounders read in tenths of a foot? Why could it possibly matter that it's 276.3 ft. deep?
Dan

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Replies:

[> [> [> [> Ha! Tenths of feet -- Randall, - Tuesday - 02/10/09 - 1:51am

Thanks Dan. It's funny to be learning about many things--including eye site--from Murre. Only a couple years ago and while working in tight quarters, I noticed that I couldn't quite see the fastener nor the hole I was attempting to guide it into. I thought at first I'd inhaled too many epoxy fumes. But then Joanna reminded me I'm over 40. One can always depend on Joanna for the important stuff--like putting me in my place.

Wacky readings? I get those from my through hull unit...due to really muddy water...transponder out of the water, etc. But what do you mean by whacky?

Tenths of feet. That's funny. Now, let's see, I draw 3.8 feet and the depth is 276.3, so how many tenths of minutes till I run aground?


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[> [> [> [> [> thru hulls -- Dan M32 #36 Independence, - Tuesday - 02/10/09 - 12:40pm

Randall,
By wacky readings I meant that as I was sailing the soundings seemed ok and then they would fluctuate wildly. I knew It wasn't reading the bottom accurately. I never had that problem with any of the other sounders on any of my past boats. I know that in certain circumstances sounders will jump around. When I was sailing from Panama to Equador last June on a Passport 40 the sounder would occasionaly show 50 or 80 feet but we were 300 miles off shore. The captain said it was temp. changes. I just not ready to trust the new sounder yet. I think a hole though the hull is probably the best for a transducer.
Dan


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