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Furuno 620

Old 07-29-2013, 05:13 PM
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Default Furuno 620

Hello everyone, im looking for some help using this to its maximum performance. Can anyone explain to me exactly the best way to set this up for bottom fishing using the gain, what to look for and how to correctly read it with the colors? How do I see bottom fish and what is the trick in using this machine to its capacity?
I have had the gain on auto and recently heard that im limiting myself and need to learn how to read this machine for bottom fishing and finding fish up in the columns. Can anyone please help explain what I need to be doing? Thanks, Jim
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Old 07-29-2013, 09:03 PM
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What transducer are you using and how deep is your bottom?
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Old 07-30-2013, 02:59 AM
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Using the Airmar, transom mount. Im fishing west central Florida, typically 30-120'.
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Old 07-30-2013, 08:11 AM
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I used to run a 620/p66 combination in the GOM. Here are a few tips.......

First, set the gain to "manual". Forget about the auto setting. Then manually adjust the gain from 5.0 (in shallow water ..... like under 30ft) and go up to 6.0 or 7.0 in deeper water (to 150ft).

With a p66, primarily keep the transducer on the 200khz setting. The 50 is OK but the p66 has a pretty wide cone angle at 200 so you will see plenty around the boat.

Once you get the hang of the 620 at 200khz, then start playing with the display setting. The Bottom Zoom and bottom lock features are very nice and valuable for bottom fishing.

I like the blue background although sometimes change it to white. If you are fishing, you will find "hard" bottom once the thickness of the "red" returns becomes thicker.

Play with it and you will find that you have an excellent combination.
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Old 07-30-2013, 08:17 AM
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Bottom zoom is great (IMO) for
finding structure
and bait. Never cared so much
for finding individual fish.
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Old 07-30-2013, 04:03 PM
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Originally Posted by chrisrack View Post
I used to run a 620/p66 combination in the GOM. Here are a few tips.......

First, set the gain to "manual". Forget about the auto setting. Then manually adjust the gain from 5.0 (in shallow water ..... like under 30ft) and go up to 6.0 or 7.0 in deeper water (to 150ft).

With a p66, primarily keep the transducer on the 200khz setting. The 50 is OK but the p66 has a pretty wide cone angle at 200 so you will see plenty around the boat.

Once you get the hang of the 620 at 200khz, then start playing with the display setting. The Bottom Zoom and bottom lock features are very nice and valuable for bottom fishing.

I like the blue background although sometimes change it to white. If you are fishing, you will find "hard" bottom once the thickness of the "red" returns becomes thicker.

Play with it and you will find that you have an excellent combination.
Know some questions on what you said. How do you know when the gain is set correctly, I mean what should the screen look like? Now the red returns you mention, can you please describe what I should be seeing when Im over hard bottom? I get the zoom but not quit sure exactly the purpose of the lock feature. Thanks for your help.
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Old 07-30-2013, 06:55 PM
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