Don't beat me up too much if this has been covered a lot, I can't seem to find an answer. I am wanting to upgrade my electronics to the Helix 7 with SI. My question is, do I need a structure scan module to use the SI or is that for something entirely different?

Structure scan is a Lowrance item. The Helix 7 SI will come with a transducer to make it work. Just make sure to follow all directions for install.

Ok thanks, that clears a lot up, sorry I'm new to these type of electronics

 

There are three Helix 7 SI units

 

Helix 7 SI GPS--discontinued

 

Helix 7 CHIRP SI GPS G2 current model--CHIRP Sonar and CHIRP Imaging.

 

Helix 7 CHIRP SI GPS G2N  current model that is networkable

 

All come with same transom mount transducer XNT 9 SI 180 T. It gives the unit traditional sonar, Side Imaging, blended SI for Down Imaging, and Temp.

 

Those units get sharper images with the XHS 9 HDSI 180 T transducer since it is longer and produces a thinner imaging pulse. You can exchange the included transducer for that model by contacting Humminbird Customer Service--it is about a $85 upgrade including shipping.