FCV 620 can anyone tell me what it's showing
Submitted by luke_93 on Sun, 2015-03-08 19:27
Hey guys as the title says I have a furuno fcv 620 and I am just wondering if anyone can tell me by the pictures what it is its reading? And if so how do you tell the difference between what it is reading and also any tips on a better setup. Any help would be great thanks
Image Upload:
roddo
Posts: 482
Date Joined: 16/10/09
Others may have a much
Others may have a much better opinion then me but your gain is way to high for that depth and it looks like a lot of clutter with some smallish fish sitting on the bottom.
z00m
Posts: 1086
Date Joined: 10/05/14
That looks like wayyyyyy too
That looks like wayyyyyy too much gain and there are multiple bottom echos. How deep was the water you were in? *Edit - I see it was 11m*
This is a simple 2 pager on how to set your base tune of the furuno sounders. First page is an explanation of what each item does and the second page is a how-to set the basics.
www.teamcruisecraft.com.au/images/TUNING%20SOUNDERS.pdf
luke_93
Posts: 44
Date Joined: 12/08/12
Thanks for that. Will save
Thanks for that. Will save that page and give it a try seems helpful. So nothing in that pic? What about the red at "8" would that be anything? And do certain fish or structures show up certain colours?
roddo
Posts: 482
Date Joined: 16/10/09
There is something there but
There is something there but the gain is so high that its not showing its true size the darker the colour the larger the swim bladder.
Mattyb84
Posts: 388
Date Joined: 28/12/12
As others have said to much
As others have said to much gain mate ill fish 6.5 in 250 mtrs with my 585. Best bet in that depth put the sounder on auto fishing mode by pressing the gain button and select fishing and it will give you a much beta idea on what is goin on and get rid of the clutter
Pgfc member
luke_93
Posts: 44
Date Joined: 12/08/12
Oh mine is way to high then
Oh mine is way to high then
sarcasm0
Posts: 1396
Date Joined: 25/06/09
yep
As z00m said, the multiple bottom returns in the right image are the giveaway... You have the gain so high the signal is firing from the transducer, off the bottom back to the boat, then bouncing off the hull, back to the bottom, then back to the boat, bouncing off the hull and back to the bottom and back to the boat. Thus the three bottom returns at 12, 24 and 36 metres.
In tuning the gain people often increase the range and turn up the gain until you can just see a second bottom return and then change the range back to the depth you are actually in. This should give you some small clutter in the background but a proper idea of what is actually there in the water column and bottom. The red line showing the bottom as the most dense object on the screen, anything showing up hard red in the water column should be the same density as the bottom.
I dunno about the 'darker the color the largerr the swim bladder' comment as the swim bladder contains air and not being very dense. I would have thought it would show up in a lighter shade.
Bryan
luke_93
Posts: 44
Date Joined: 12/08/12
Thanks heaps guys will have
Thanks heaps guys will have a look at it. What would the bottom be if it was red with green or will the bottom only show up red? Just trying to get the most out of the sounder guys it's a bit more technical then I'm use to
Mattyb84
Posts: 388
Date Joined: 28/12/12
Best bet mate is go in real
Best bet mate is go in real shallow clear water say 5/8 mtrs were you can clearly see what's on the bottom eg weed sand rock and see how your sounder looks over different types of bottom as it will show the same when you head deeper mate hope it gelps
Pgfc member
holth
Posts: 812
Date Joined: 09/10/06
Put it in simulator mode ,
Put it in simulator mode , get out the manual, have a read and play around with the settings. You can do this in your driveway. It will give you a better understanding of how the functions work.
luke_93
Posts: 44
Date Joined: 12/08/12
Thanks guys for the help.
Thanks guys for the help. Have had a read of the manual but didn't think of putting it in simulator mode good idea thanks
JohnF
Posts: 2836
Date Joined: 07/07/10
I run 3 gain in 300 m on my
I run 3 gain in 300 m on my 587.........6.4 gain in 10 m of water, you will be showing each drop of water.....
Boston Whaler 235 Conquest......getting the flogging it was built for.
sarcasm0
Posts: 1396
Date Joined: 25/06/09
Question for JohnF
Do you know if the gain settings translate between 600/1kw transducers? I believe the SS264's you are running have a much better 'Q' rating than the T/M 600W units, does this extra sensitivity mean you can run lower gain?
Bryan
luke_93
Posts: 44
Date Joined: 12/08/12
Ok so I was way off? Will
Ok so I was way off? Will the transducer make any difference? I'm running a 600w thru hull
RobertMc
Posts: 326
Date Joined: 19/01/09
johnf, 3 gain in 300m? i run
johnf, 3 gain in 300m? i run around the 6 in the 40s-80s if your runnning 3 in 300 you must be running in a different frequency and have tvg on high?
mullows
Posts: 738
Date Joined: 25/12/08
I was having trouble with my
I was having trouble with my transom mounted 1kw tranny on my boat at speeds above 12 knots due to a range of things so installed a p79 (600w)shoot thru hull for my fcv 585. Often chopped and changed between the 2 trannys over time to see which I preferred in water under 50m and the 600w was just as good for most applications, always found good fish both bottom fishing and trolling for bills. As said above gain way too high and no need to go above 5.0-5.5 for depths out to 50-70+ meters. Subtle changes are often worth looking at with the gain down I found.
Cheers
Mullows
The Older I get the better I was :-)
ginodan
Posts: 37
Date Joined: 04/09/14
Do yourself a favour speak
Do yourself a favour speak to Ryan thipthorp from ocean side tackle and marine sent me a detailed description on the correct settings for my 587 and I've never looked back , very helpful man