Earlier this spring I bought a 998 SI that I mounted at the console. I have since gotten a fairly good deal on a 1157. How would you guys rig these?? I really like having the big screen 1157 at the console, but if I move the 998 up to the bow and run it off my Terrova Universal Sonar, I will not have SI. Anyone else have this problem, and how did you solve it??
I’d put them right next to each other.
998 runs SI
1157 runs GPS chart and sonar.
That’s how i would do it.
Link them together of course. 
The problems with that are:
1) Then I have no graph at the bow when I’m up there riggin or jigging.
2) On my skeeter, I don’t think there is enough room for both of them
I would add an SI transducer to the Terrova.
There is a really good resource on how to mount this from a fellow IDO member with pictures.
I would mount the 1157 up in the bow and leave the 998 on the console. That way you are still able to utilize both screens for any type of fishing.
I mounted my 999 on a ram ball on the drivers side gunnel at the console. When fishing on the bow I simply loosen the arm and swivel it facing the bow seat. I have my si transducer mounted to a dedicated deployment arm at the bow.
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I would mount the 1157 up in the bow and leave the 998 on the console. That way you are still able to utilize both screens for any type of fishing.
X2. With that 10″ screen you can use the 1157 as the GPS unit even at WOT.
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The problems with that are:
1) Then I have no graph at the bow when I’m up there riggin or jigging.
2) On my skeeter, I don’t think there is enough room for both of them
There is no problem – you just need another unit!!! 
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