So….I finally got the Precision Trolling book and I am trying to understand the Target Depth chart. Maybe I have not had enough coffee this morning……but I will walk through an example.

For a Rap SR-7: According to the depth curve for 10# mono it will take 68′ of line to reach 9′ depth. Now, if I look at the target depth chart for 10#/4# diameter Fireline and follow it down to 9′ it gives a dive curve depth of 7 ft. I assume this means to reach 9′ with 10/4 Fireline I should let out the amount of line for 7′ of the 10# mono curve….that would mean I would have to let 38′ of line to reach 9′ depth?

If the answer to that question is yes, then why does their dive curve for 10/4 not reflect that? At 38′ back the dive curve shows a running depth of around 7.5′ for 10/4 fireline.