Side-scan sonar pic: Pensacola Bay wreck with 10' of relief - Pensacola Fishing Forum

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Old 06-17-2013, 10:40 PM   #1
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Default Side-scan sonar pic: Pensacola Bay wreck with 10' of relief

This wreck is 100' long, 28' wide with 10' of relief. Most folks should be able to find this one, just watch your bottom machine!
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Side-scan sonar pic: Pensacola Bay wreck with 10' of relief-baywreck06-jpg  
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Old 06-18-2013, 11:08 PM   #2
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I know where it is
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Old 06-19-2013, 05:23 AM   #3
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Looks like the shrimp boat Josie Maria North of Three Mile Br. Sank during a Hurricane 20 years ago.
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Old 06-19-2013, 10:53 AM   #4
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What helps you determine the relief? Is there something on your screen that is not posted? Just curious because ive thought about getting a side scanner but my lack of fishing time keeps telling me not to.
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Old 06-19-2013, 11:50 AM   #5
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Quote:
Originally Posted by Deeplines View Post
What helps you determine the relief? Is there something on your screen that is not posted? Just curious because ive thought about getting a side scanner but my lack of fishing time keeps telling me not to.
Murf the old time name for side scan is shadowgraph. That should answer your question about height.
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Old 06-19-2013, 11:51 AM   #6
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Quote:
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Looks like the shrimp boat Josie Maria North of Three Mile Br. Sank during a Hurricane 20 years ago.
You have coordinates Sealark?
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Old 06-19-2013, 11:57 AM   #7
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You have coordinates Sealark?
Yes in loran I gave them to whack em, where are my GPS numbers?
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Old 06-19-2013, 12:56 PM   #8
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I was wondering if it was the one south of 3 mile...
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Old 06-19-2013, 01:33 PM   #9
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Yes in loran I gave them to whack em, where are my GPS numbers?
Ron: The last time you asked, you told me to tell you to "check your inbox" should you ask for the GPS numbers again.
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Old 06-19-2013, 01:40 PM   #10
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Quote:
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What helps you determine the relief? Is there something on your screen that is not posted? Just curious because ive thought about getting a side scanner but my lack of fishing time keeps telling me not to.
In this case I measured the relief with my bottom machine. It was the quickest and easiest way.

In general the side-scan shadow length, the distance from the sonar transducer to the bottom, and the distance from the start of the shadow to the transducer can be used to calculate the relief using a little trigonometry. Some side-scan software packages will do much of this work for you.
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