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Garmin GSD-24

Old 07-10-2012, 01:24 AM
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Default Garmin GSD-24

Can someone explain to me the settings they are using if any? I the Garmin GSD-24 installed on my boat with the AirmarTM-260 transducer. It seems to be reading OK. This is my first Sonar so I am trying to learn the thing. It is showing depth and water temp as I am running. I am just wondering if there is anything in particular I need to set. Just looking for some advice and/or opinions on this.

Thanks
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Old 07-10-2012, 08:00 AM
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I am using mine with an M260. Make sure gain is
On auto high. If you are bottom fishing set zoom to
Bottom lock. This is all i have had to do with mine.
Use the dual frequency mode as you will pick up some
Things better with the 50hz due to wider cone. Then
Again you will see some things better with 200 hz due
To higher sensetivity. That is about all i know. I do
Know this is a much better sonar than previous models
From garmin.
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Old 07-10-2012, 08:02 AM
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On the bottom lock i am looking at the deepest 50 ft.
Setting this is pretty self explanatory.
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Old 07-10-2012, 12:10 PM
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Good gouge. Was wondering the same thing. I'll have to take a look at my settings when I get out to San Diego next week.
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Old 07-10-2012, 02:33 PM
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I installed the software update and it did help with the steep drop offs. There are a couple of other features that are pretty handy as well. Garmin still has some work to do on the 50 hz side to get this unit up to snuff.

I'm anxiously awaiting Furuno's CHIRP unit. I hope they won't disappoint us.
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Old 07-10-2012, 02:35 PM
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BTW, one thing I did notice after the software update was it seemed the processing speed slowed down on the GSD 24
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Old 07-10-2012, 06:31 PM
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The April 25th update upgraded the GSD24 from 2.00 to 2.10
The May 25th update does not address the GSD24. Only correct MARPA issues with MFD displays.
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Old 07-17-2012, 01:24 AM
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First make sure you have the updated manual for your multi function display, 4000 series or which ever. They have an updated instruction section on sonar & talk about the capabilities & functionality.
Some good points made already by others but just to reiterate:
Running on dual frequency, so you split the page into two sections, 200khz & 50 khz is a great way of getting a very sensitive picture (200khz) & a wider picture of the bottom (50khz). If you use A scope it will show how many feet the transducer beam is covering on the bottom. Thats helpful because if you get weaker signals on the 200 but stronger on the 50 it most likely means the fish are just on the edge of your 200 & you need to shift your drift.
The auto gain is pretty good on the units, don't push it too high in shallow water, auto low or med might do it, experiment. The 50khz does seem to need some manual adjustment at times. If you see fish on the 200 & not the 50, go to gain & use the up/down button to push gain up a little until you start to get a bit of speckly light interference moving from top to bottom, the fish should show up.
Both zoom & shift are very good if looking hard to bottom in water over 150', it can help to pick out low lying structure or fish hugging bottom. In effect you are maximising your pixel count on the screen to help spot what you are looking for. Shift is best, doesn't distort the picture as much whereas zoom makes a bump on the bottom appear like a sharp pinnacle.
Start on your auto settings, play with the stuff I've talked about & then progress to more advanced settings if you wish.
A lot depends upon the conditions/depth you fish in, what type of fish you are after & very much, your fishing style, ie trolling, drifting, anchoring etc.
You won't be disappointed, you have a great set-up there
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Old 07-17-2012, 05:47 AM
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For anything up to about 150 feet, I just leave it on auto medium. The picture is pretty good at all depths and I haven't found a need to tinker.

Beyond 150' I go to auto high until I reach about 300' then just kick the gain up until I get the speckles.

Beyond 600 feet it's gain up to nearly max. I forget the name of it, but there is another setting besides gain that effects the size of a return varied by depth (so a higher return doesn't appear monstrous while a lower one tiny - assuming same object). You need to play with that one to see where you want it. Since I'm usually interested in the top of the water column, I will sometimes turn it down to min settings. Still playing with it though.

This unit is very good up to about 300 feet. After that, it falls down quickly. I think its afraid of heights.
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Old 07-17-2012, 07:00 AM
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Originally Posted by gerg View Post
This unit is very good up to about 300 feet. After that, it falls down quickly. I think its afraid of heights.
One word: Furuno

Bob
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Old 07-17-2012, 07:09 AM
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Originally Posted by wugubob View Post
One word: Furuno

Bob
Yeah well, if I were to go non-garmin chirp and needed a whole other mfd, I might go simrad. I really like the nse12. But I pretty much closed that door when I got the 6212. I'm stuck with Garmin for a few years at least.

I can still catch fish, a good sonar would make it easier though. Knowing tuna are crusing under us at 80 feet while drifting in 3000 feet of water can make the difference between a limit and a few in the box.

It' sometimes tough to convince guys that they should be jigging in the middle of the night. But that's what catches fish when they don't come up to your bait.
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Old 07-17-2012, 11:15 AM
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Originally Posted by wugubob View Post
One word: Furuno

Bob
Way to really help out the team Bob. Your 41 posts to date, including your 4 words above (in which you were able to correctly spell your name) have provided countless THT.com'ers a wealth of information. Keep up the good work!!

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Old 07-17-2012, 11:29 PM
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Originally Posted by I'm on a boat View Post
Way to really help out the team Bob. Your 41 posts to date, including your 4 words above (in which you were able to correctly spell your name) have provided countless THT.com'ers a wealth of information. Keep up the good work!!

Is this better?

Furuno 585+TM260
-------------------------------------------------
1. Move into 450 feet territory.
2. See fish marks at bottom
3. Drop line to bottom
4. Hook a fish
5. See blob around 150 feet
6. Reel line up
7. As line comes up to 150 feet, hooked fish gets snatched by shark.

Bob
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Old 07-18-2012, 08:46 AM
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Nice try, but the Furuno 585 can't shake a stick at the GSD24. Been there.
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Old 07-18-2012, 01:46 PM
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NT

Last edited by bens2; 07-18-2012 at 01:58 PM.
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Old 07-18-2012, 04:05 PM
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Here's some shots for you's guys:







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Old 07-18-2012, 04:13 PM
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Care to share your settings? Those are some nice shots.
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Old 07-18-2012, 05:16 PM
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Nothing really out of the ordinary, Auto Medium on gain (IIRC), split frequency with bottom zoomed to the lower part of the column, 30 foot.

I've just been playing with all the settings and mainly the bottom zoom/lock. Since the majority of my fishing is bottom dwellers in 150 foot or less, it's (IMO) all about finding the structure and being able to read what type of bottom is around the structure.

Grouperkng has been posting some pointers in the FL / GA forum and I've read some good articles lately about reading and recognizing bottom structure and working the electronics.

The last image is of the pipeline where the Red Snapper like to call home. We gave them a new home on that trip.

BTW, how are the 'hoo rigs selling John?
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Old 07-18-2012, 06:45 PM
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Beach Tyme

What transducer are you using?
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Old 07-19-2012, 01:04 AM
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Here are some shots. In all cases I have started out with gain at auto high (because of the depth) & when I have my mark I have manually adjusted gain higher, seperately on both frequencies if using dual frequency. You will notice the 'rain' dropping down the screen toward the bottom. It stops before the fish zone allowing both a clear view of what you want to be looking at & maximising returns so you don't miss stuff.
You will need to adjust through the day as you move through different depths, tide picks up, dirty water comes through, conditions affect the sensitivity.

First, using shift & then splitting the screen to zoom into the shift section I was looking at.

This one shows pollack ahead of a wreck. Fish 6 - 15lb



This one shows cod close to the bottom. Fish 8 - 15lb, although one went 30lb



Some more pollack. Fish 6 - 18lb



These are simply zoomed in, no shift.

A bit of structure



Structure, bait & fish



I use a GSD24 & R199 2kw transducer.
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