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Old 23-11-2016, 08:49   #16
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Re: Fishfinder to help anchoring around coral

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Originally Posted by ur2slo View Post
There's plenty of discussions on here about your questions, . A lot depends on where you anticipate HAVING to anchor in my case if I'm out, so hence up here I run a lot.

As mentioned tho, and now that it's clear, Ann's right, this was about finding coral heads.

Happy sailing!
Sheesh there are no questions and we have not gone off the topic ... this was one member asking another one a question and getting a response ... case closed and no reason for others to chime in.
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Old 23-11-2016, 12:26   #17
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Re: Fishfinder to help anchoring around coral

I don't know how interested the OP is, but more input from people using fishfinders for bottom scouting might well be appreciated. There are a number out there. He can't get a Probe, they're no longer made, so, imho, more input would be more help to him.

Ann
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Old 23-11-2016, 13:52   #18
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Fishfinder to help anchoring around coral

You want either a downscan or sidescan Sonar.
May be more of a marketing term than an actual sidescan, but either way you want what is called a CHIRP Sonar which I think is a transducer that transmits a broad range of frequencies as opposed to one set freq., the picture you get is pretty photorealistic if your in very smooth water, you really can see a shipwreck, tree or whatever is down there like it was a photo.
However boat movement will blur the image of course, the Sonar doesn't know the boat is bobbing up and down.
The Raymarine Dragonfly I had was excellent, and surprisingly inexpensive
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Old 23-11-2016, 17:25   #19
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Re: Fishfinder to help anchoring around coral

Here you go, a 7" chart plotter with downscan CHIRP Sonar, for under $400.
That is an excellent price and I doubt it will last
http://www.thegpsstore.com/Raymarine...m_medium=email
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Old 23-11-2016, 21:47   #20
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Re: Fishfinder to help anchoring around coral

The greyscale fish finder I mostly use is a Northstar 443s and it has provided excellent service for bottom condition evaluation for many years. It was the cheapest available at the time I bought it and has a navigation mode which displays large numerals easily seen from the cockpit down the companionway. Unfortunately I think this model has now gone out of production.


The previous one I used was a Hummingbird greyscale and it also gave excellent service. I think that just about any fish finder is going to give better service than just a depth indicator. One of the features I really like about them is you can see whether the depth is shoaling or increasing at a glance from the trending of the bottom indication.
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