Author Topic: stretching fish arches?  (Read 5099 times)

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Offline Catfish Capone

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stretching fish arches?
« on: March 06, 2014, 09:43:36 PM »
I think I have this concept figured out just want to make sure.  When Im using 2d sonar, do I simply increase chart speed to stretch my sonar returns to show a longer, more defined, arch?


Offline slabbacks

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Re: stretching fish arches?
« Reply #1 on: March 06, 2014, 09:52:15 PM »
Cat while running the boat I match it to boat speed or one higher.  Are you wanting this for the console or bow?

If your wanting this to pick out deeper returns there are other methods you could use to in-large those returns for a better view.
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Offline bobcoy

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Re: stretching fish arches?
« Reply #2 on: March 07, 2014, 07:03:08 AM »
Catfish, what are you trying to do? The arch is what shows a fish going through the cone of the transducer. The size or shape of it is only a matter of how fast it passes through the cone. Bob

Offline Catfish Capone

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Re: stretching fish arches?
« Reply #3 on: March 07, 2014, 08:59:54 AM »
Unit will be @ console, I swear I read somewhere that increasing/decreasing  chart speed would stretch out/ your return to get a better look @ structure, arches, etc.

Offline ITGEEK

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Re: stretching fish arches?
« Reply #4 on: March 07, 2014, 09:10:48 AM »
I don't think there is any way to control the size of
the fish arches.
If you use Fish ID, you will still get the arches, and
have a nice little symbol for every fish.

Offline bobcoy

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Re: stretching fish arches?
« Reply #5 on: March 07, 2014, 09:56:33 AM »
if the chart speed is fast your screen will appear more grainy. Like slabback says try to keep your chart speed close to your boat speed.(2mph=2 for chart speed). It is mostly the way you like it best. Bob

Offline Humminbird_Greg

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Re: stretching fish arches?
« Reply #6 on: March 07, 2014, 12:42:20 PM »
There are two ways to do this Catfish, one is to increase the chart speed and the other is to slow the boat down.  Slowing the boat down will allow the unit to give a better detail to the images (2D or Si sonar).  Of course you have to get the fish to cooperate and pass through the center of the transducer beam for the best arches!

Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline Catfish Capone

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Re: stretching fish arches?
« Reply #7 on: March 07, 2014, 04:23:01 PM »
Once again Greg, thanks!

Offline slabbacks

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Re: stretching fish arches?
« Reply #8 on: March 07, 2014, 05:59:10 PM »
This may help.  The first shot is a boat speed of 4 mph and a chart of 5.  You can also see what he is talking about in reference to getting the fish to cooperate.  The bright returns are in the center cone and the others were off to the side.  This set up when making a pass will get you what I think you are looking for.



Here with the same chart speed and lower boat speed you can see how the return is starting to get pulled out from the fish being in the beam longer and having a chart moving faster.



Hope that helps to explain it better.  good luck
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Offline newkid4si

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Re: stretching fish arches?
« Reply #9 on: March 07, 2014, 11:42:11 PM »
Slabbacks brings up a good point that is often overlooked---"getting the fish to cooperate".

You can have everything right (transducer level, boat/chart speed correct, sensitivity correct, etc.) and if the fish are very high in the water column or
belly to the bottom or at the very edge of the sonar cone or moving quickly in any direction, the textbook arches just aren't  going to happen.
It isn't the equipments fault, it's the conditions.

I have had better luck by establishing a consistent routine ( chart speed per boat speed ) and sticking with it. The search for the perfect arches all the time
could lead to an express trip to excess mental stress.

That said, I will notch up the chart speed per boat speed AFTER I have found a known target. It will distort the living crap out your nice image, but often
will show details that were compressed before.  Find something that works for you and stick with it.

                       Mike

Offline Humminbird_Greg

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Re: stretching fish arches?
« Reply #10 on: March 10, 2014, 12:40:21 PM »
Slabbacks brings up a good point that is often overlooked---"getting the fish to cooperate".

You can have everything right (transducer level, boat/chart speed correct, sensitivity correct, etc.) and if the fish are very high in the water column or
belly to the bottom or at the very edge of the sonar cone or moving quickly in any direction, the textbook arches just aren't  going to happen.
It isn't the equipments fault, it's the conditions.

I have had better luck by establishing a consistent routine ( chart speed per boat speed ) and sticking with it. The search for the perfect arches all the time
could lead to an express trip to excess mental stress.

That said, I will notch up the chart speed per boat speed AFTER I have found a known target. It will distort the living crap out your nice image, but often
will show details that were compressed before.  Find something that works for you and stick with it.

                       Mike

+1
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline Catfish Capone

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Re: stretching fish arches?
« Reply #11 on: March 11, 2014, 12:02:55 PM »
Thanks guys, Im installing the 998 this weekend and look forward to putting it to good use.  Hey Slabbacks that 1st image on with humviewer, those are incredible arches, was that with down imaging or just how sonar looks when you run it through humviewer?

Offline slabbacks

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Re: stretching fish arches?
« Reply #12 on: March 12, 2014, 08:37:24 AM »
Cat

  That was a recording I ran through HV'er.  You will be able to watch your 2D or SI along with the track you ran.  When you go into settings you can change how you wish to view the screen and also work with color, contrast ect.  This was the 2D screen.  I like HV'er because I can mark waypoints and view in google earth.  With the aid of a HDMI cable I can hook the PC up to a flat screen at the house and really see what I've been missing.
Tell them I've gone fishing!

Offline Catfish Capone

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Re: stretching fish arches?
« Reply #13 on: March 12, 2014, 10:53:04 AM »
OOOOOHHHHHHH, Im so very excited to get this unit up and at it!

Offline Catfish Capone

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Re: stretching fish arches?
« Reply #14 on: March 12, 2014, 10:58:19 AM »
Is there a cost for HumViewer???

Offline Tjo

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Re: stretching fish arches?
« Reply #15 on: March 12, 2014, 03:16:34 PM »
What is hummer view did a search and couldn't find any info on it?

Fish on !!!!

Offline slabbacks

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Re: stretching fish arches?
« Reply #16 on: March 12, 2014, 03:25:57 PM »
http://forums.sideimagingsoft.com/index.php?topic=172.0

Hit forum on top left of this site and scroll down to software / 3rd party software.  The above link will take you to one of the post there.  You can read through the info and get all the information you need.  hope it helps
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Offline Tjo

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Re: stretching fish arches?
« Reply #17 on: March 12, 2014, 03:27:59 PM »
Thanks will check it out.
Fish on !!!!


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