Hey there,
I have a 718, as far as settings I will go back and forth from about 5 outta 10 on most settings, and factory default. As far as the arcs you can increase the sensitivity to see more detail, but I generally change the sonar to universal seems to be a bit more detail than dual beam but that's just me.
Do you have the gps hooked up to the 718? I am waiting for mine to arrive, have not installed it yet...we will see...I have been caught out in the fog one too many times...lol....late ...b
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