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Upgrade, tm260 or chirp???

Old 09-27-2014, 01:02 PM
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Default Upgrade, tm260 or chirp???

Last year Gil sorted me out with a Furuno 627 sounder and basic P66 ducer.
I drift for bft in the Adriatic in 300 to 600'.
It sure beats the old analog Garmin I had.

Here is a screenshot seconds before I got a 150lb fish hook up:
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I was going to invest in a better ducer like the tm258 / tm260 but now there's so much talk of the wonders of chirp I don't know what to do.

Is it possible to get a complete chirp unit for around $1600 or am I better off sticking with the 627 I have and getting the ducer upgrade ?
I see some boats on wicked tuna use the Furuno 587 units and they individual chunks being eaten by tuna as they sink which is pretty amazing.

Any advice or suggestions are most appreciated
Old 09-27-2014, 01:41 PM
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I don't believe everything I see on TV.

Last edited by VanW; 09-27-2014 at 02:08 PM.
Old 09-27-2014, 01:53 PM
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Furuno has a very good traditional sonar detection circuit ...with a quality transducer it is still a serious contender for your depths.
100 meters is reaching the target detection limits of a P66 under most conditions....it will read bottom deeper but harder to see targets deeper than 100 m.

You are using a single element 600 watt P66...good but entry level.
Going to a 4 element Tm258 is 25 times more sensitive at 50 kHz..than the P66
A 8 element TM260 is 50 times more sensitive. at 50 kHz.....and the 200 kHz is broadband.
You will see a difference at your depth with either of these transducers.
And at 100 meters I would run dual cone just like you are doing now...or use Marker Zoom.




You can also try using Marker Zoom to expand a selected area. PG.4 of your manual.


Gil

Last edited by semperfifishing; 09-28-2014 at 10:09 AM.
Old 09-27-2014, 06:17 PM
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If it were me I would just upgrade the transducer.
Old 09-28-2014, 08:25 AM
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I have a B60 (same as P66) and TM260 on my boat. The TM260 is definitely a higher quality transducer. However, it has a very narrow 200kHz beam. Many of the fish you are seeing now may be lost with the 260 due to beam width. I only fish to 100ft, but I always use my B60 if I am looking for pelagics. My 260 is used for bottom work only.

Whatever you choose, consider your beamwidth. This may end up pushing you to CHIRP.

Not necessarily recommending that you go with CHIRP, but to answer your question, an NSS7 EVO2 with TM150M could be had for less than $1600. With a B75 you'd be around $1700.
Old 09-28-2014, 08:46 AM
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I have to give semperfi some props for honesty. He's giving you the same answer I would. Furuno is tough to beat in shallow water 100m and less. While I have chirp now. I may be going back to furuno standard sonar.
Old 09-28-2014, 09:23 AM
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You like the standard sonar better? Which chirp do you have?
Old 09-28-2014, 09:51 AM
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Gsd 26
Old 09-28-2014, 10:29 AM
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I think it will be a tm260 for me.
I don't fancy touch screens as I'm chopping up sardines for chunking all day long.
I also love the gain knob on the Furuno.
Thanks for all the advice!
Old 09-28-2014, 11:04 AM
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Originally Posted by tint dude View Post
I have to give semperfi some props for honesty. He's giving you the same answer I would. Furuno is tough to beat in shallow water 100m and less. While I have chirp now. I may be going back to furuno standard sonar.

So are you saying you like the standard sonar better? How do you like your gsd 26?
Old 09-28-2014, 11:46 AM
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The op already had a very good Furuno traditional sonar circuit.....adding a quality multi element transducer will certainly improve his target detection at his fishing depths and keep his costs down.

So for anyone who already had quality working sonar system upgrading the entire system to CHIRP may not always be the best option etc.

On the other hand ..if someone is outfitting a new boat or overhauling and entire outdated system then looking in a CHIRP system certainly is a positive option.
Old 09-28-2014, 05:35 PM
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Originally Posted by coastalfiberglass View Post
So are you saying you like the standard sonar better? How do you like your gsd 26?
I understand your question but the answer is not as clear. I am comparing a furuno to garmin ff different electronics. I mostly bottom fish for grouper in 200ft or less. Grouper laying on the bottom blend in no color separation. Also tails coming off the bottom for bottom hardness recognition are fuzzy not as sharp as furuno.

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