I’m thinking that the “CBO” was a typo for “CHO” (the “B” key is close to the “H” key on your keyboard). That is a Control Head Only unit and it will not come with a transducer.
Yes the 1197 is Ethernet capable as Robert stated.
If I am understanding you correctly you are going to set up two locations on your boat to use the new 998 unit from, correct? If so, you will need to buy a second power cable and possibly a GPS Receiver, unit gimbal mount and connector collector – all depending on how you do this. You will definitely need an Ethernet Connection Cable (or cables) in the appropriate length(s).