I bought a 185FS with 150 Evinrude a couple of years ago. I want to upgrade my fish finders. On the bow is a Lowrance Mark 5 b/w and the console has a Humminbird Piranha b/w.

 

I bought a Humminbird Helix 9 SI/DI and thought about putting it on the bow but now I'm trying to decide what to put on the console. Do I need SI/DI on both units?

Your helpful advise would be appreciated.

Thanks in advance.

 

I use SI/DI/2D/GPS at the console and bow. I want all the information available no matter what location on the boat I am and I want that information from my location, not a boat length away.

You may can get by with less.

You can share sonar technologies with any version of the Helix 9, 10 or 12 via Ethernet.

I will just be using one of my units tomorrow when fishing at an electric-only lake. I will be at the bow running the bow trolling motor and will have SI/DI/2D/GPS and 360 available.

 

 

I was thinking about buying another helix 9 or 10 with Si/DI but didn't know if the images from both units would interfere

with each..

I have a14'tracker topper I use for electric only and use a minnkota power drive on the bow and the minnkota EO on stern.

Installed an Lowrance Elite 5x CHIRP on it.

get a helix 9 or bigger without DI or SI and network it with your SI unit.  you can run it all off the same transducer and share the SI and DI between units.  you could always hook up the 2D sonar through a transducer built into or attached to your bow mount if you want to see what is directly below the bow of the boat.