No the US2 will not do DI. It will only do 2D. Yes if you buy units that are networkable, then you can share the SI and DI transducer with the transom. You'd just need the ethernet cable unless you have ilink on your Terrova then you ight consider a 5 port hub so that you can use the link features of the trolling motor with your FF.

No, running a cable is not difficult at all. Remove 4 screws under the head and one horizontal screw through the shaft and slide the head off. Unplug 4 wires then slide the shaft out from the bottom. Run transducer cable through then place cable in slot on shaft and reassemble. One person job and all you need is a phillips screwdriver.

What is your budget and what size screen do you want? I'd stick with Humminbird to match up with the rest of your equipment. There are several Helix models from 5" to 12" to choose from. I think it has to be atleast a 7 to network. they are also releasing the gen 2 helix units in a month or so. you can either get more features or find a gen 1 at a bargain price.

Go to someplace like BPS or Cabellas where you can see the units on display to decide on the size. You really want the largest screen that you can afford to get the most out of the SI. You'll also need a mapcard to go with it if you don't already have one or two.

No the US2 will not do DI. It will only do 2D. Yes if you buy units that are networkable, then you can share the SI and DI transducer with the transom. You'd just need the ethernet cable unless you have ilink on your Terrova then you ight consider a 5 port hub so that you can use the link features of the trolling motor with your FF.

No, running a cable is not difficult at all. Remove 4 screws under the head and one horizontal screw through the shaft and slide the head off. Unplug 4 wires then slide the shaft out from the bottom. Run transducer cable through then place cable in slot on shaft and reassemble. One person job and all you need is a phillips screwdriver.
comment by Jones Trolling Motor: although this is done by many, it is not a suggested way of routing the transducer cable. The turning of the motor in the transmission can/will wear on the transducer cable and could cause the transmission to bind, drawing too many amps and destroy the control board.

What is your budget and what size screen do you want? I'd stick with Humminbird to match up with the rest of your equipment. There are several Helix models from 5" to 12" to choose from. I think it has to be atleast a 7 to network. they are also releasing the gen 2 helix units in a month or so. you can either get more features or find a gen 1 at a bargain price.

Go to someplace like BPS or Cabellas where you can see the units on display to decide on the size. You really want the largest screen that you can afford to get the most out of the SI. You'll also need a mapcard to go with it if you don't already have one or two.