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Would Appreciate Current Thoughts On The Furuno GP 1870F Please ?

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Would Appreciate Current Thoughts On The Furuno GP 1870F Please ?

Old 10-03-2014, 12:02 PM
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Default Would Appreciate Current Thoughts On The Furuno GP 1870F Please ?

Would appreciate any current input on the Furuno GP1870F please. I know people's opinion changes with use.

Would mostly use it as a sounder. Currently have an older Furuno 1650 on the boat with the Airmar 744V thru hull 600W transducer. Thought of the Furuno 587V but it's too large to fit flush in the dash.
The 1870F seems like an easy upgrade.
Have a Garmin that I use for navagation.
Would probably run a split screen of 50 and 200khz

We fish in the stream and like to mark bottom when trolling. As long as we can mark bottom in 400 foot it will work for us. Seeing the structure is most important to us.
Spoke to the Furuno tech today and he said that even if you are in water too deep to read bottom the 1870f will still work on reading fish in the water column.

Appreciate the help,

thanks

Last edited by gsrsol84mm; 10-03-2014 at 01:51 PM.
Old 10-03-2014, 01:40 PM
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AI use one as my primary fishfinder as I have a tzt9 for navigation and radar. I think it is a good sounder. I was told it uses the same technology as the 587. If you fish deep water, it is a 1kw capable unit with the right transducer. I fish in less than 120' of water, mostly less than 60', so I only use a P66 600w transducer.

The wide screen format has its advantages and disadvantages. In deep water you have less screen height to see the whole water column. However the format makes for better splitting of screens. When trolling I mostly use it split screen with each half on either a high or low frequency so I get a wider cone with the lower frequency but sensitivity to pick up thermocline, etc. with high frequency. If in deeper water I will split with top split to focus on the area I am fishing. When bottom fishing I mostly select high frequency and will do a bottom lock on one side.

Split 50kHz and 200kHz trolling over schools of menhaden with striped bass under them


Split on 200kHz with a top of the water column zoom with dense bait balls (snagging bait with lures and catching 36"+ stripers)


Sorry I don't have any bottom fishing shots.

Last edited by iFishMD; 10-09-2014 at 07:37 PM.
Old 10-03-2014, 01:45 PM
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Originally Posted by gsrsol84mm View Post
Would appreciate any current input on the Furuno GP1870F please. I know people's opinion changes with use.

Would mostly use it as a sounder. Currently have an older Furuno 1650 on the boat with the Airmar 744V thru hull 600W transducer. Thought of the Furuno 587V but it's too large to fit flush in the dash.
The 1870F seems like an easy upgrade.
Have a Garmin that I use for navagation.
Would probably run a split screen of 50 and 200mhz

We fish in the stream and like to mark bottom when trolling. As long as we can mark bottom in 400 foot it will work for us. Seeing the structure is most important to us.
Spoke to the Furuno tech today and he said that even if you are in water too deep to read bottom the 1870f will still work on reading fish in the water column.

Appreciate the help,

thanks
The GP1870F can of course use your current B744 transducer... and you will have basically the same depth capabilty due to the parameters of the B744 transducer.
Due to the GP1870f's digital processing and better filters..targeting may be markedly improved.
Furuno makes a good sonar circuit.
If you went to a multi element 1 KW transducer ...such as the B164 it will be a step up.

Last edited by semperfifishing; 10-03-2014 at 03:33 PM.
Old 10-03-2014, 02:00 PM
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I like the fish finder feature in mine. IMHO, the chart plotter is average to worse. The menu they use to do simple basic features is horrible. Not at all intuitive. I never use it for chart plotting, only FF. My 12 year old Garmin 182c does the chart plotting for me.
Old 10-03-2014, 02:09 PM
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Thank you for the replies and excellent info.
Really do appreciate the screen shots.

I think I may give one a try as it's such an easy swap for the current unit and a very reasonable price that won't break the bank .

Plan to only use it for Sonar and don't plan to get the navagation card. I also have a mini ipad with Navionics as a backup navagation machine
Old 10-03-2014, 08:25 PM
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Originally Posted by semperfifishing View Post
The GP1870F can of course use your current B744 transducer... and you will have basically the same depth capabilty due to the parameters of the B744 transducer.
Due to the GP1870f's digital processing and better filters..targeting may be markedly improved.
Furuno makes a good sonar circuit.
If you went to a multi element 1 KW transducer ...such as the B164 it will be a step up.
What sort of depth could you expect with the 1870f and the B164 ?
Old 10-03-2014, 08:50 PM
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Originally Posted by gsrsol84mm View Post
What sort of depth could you expect with the 1870f and the B164 ?
Marking bottom with moderate detail to about 800'....
Reads bottom down past 1000' but not much detail..mostly just letting you know the bottom's still there.
Old 10-04-2014, 07:00 PM
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I have one. Very good FF, but the GPS is super un-intuitive. The screen has great resolution and contrast though. I plan on replacing it with something easier to use. My unit is only 4 months old.
Old 10-04-2014, 07:05 PM
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Originally Posted by c1steve View Post
I have one. Very good FF, but the GPS is super un-intuitive. The screen has great resolution and contrast though. I plan on replacing it with something easier to use. My unit is only 4 months old.
Steve,
Thanks for the info. What transducer do you have and how deep have you used it ?
Old 10-04-2014, 08:29 PM
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Originally Posted by gsrsol84mm View Post
Steve,
Thanks for the info. What transducer do you have and how deep have you used it ?
I have an Airmar transducer, I believe it is a B45, which is 600 watts. I have not used it in anything over 200 feet. However the detail on the screen is quite good. I use the split screen mode all the time.

My downriggers are positioned nearly even with the transducer, and with the shape of the DR weight being fish like, there is little swing back. I can observe the DR weight on the screen, and can easily put the weight 5-10' off the bottom, tracking it accurately.

I will probably sell the unit, as the GPS is too difficult to use, if you are interested.

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