Yes you could.
Depending on what sonar you want to share will dictate which 800 series unit you will have to purchase:
- If you want the Si and or Di sonar from the transom mounted HDSi transducer up front; your only choice is the 898c Si unit. Be sure to set the Transducer Select/Connected Transducer menu to the “Universal Sonar 2” setting when using the Terrova’s transducer and back again to the “Hi-Def Sidescan” setting when using the sonar data from the 898c Si unit.
- If you only want the 2D sonar from the transom mounted HDSi transducer up front; you will need the 858c model unit.
To buy a unit minus the transducer, you need to look for a “CHO” designated unit (Example: “898c Si CHO”).