New to trolling

[mc captain]

You also need to make sure your reel counters are calibrated if there not that makes a difference in how far your lures are down

[itsbob]

if you are going to be using jets or tru trips the lures behind those will be spoons or harnesses.You don't want to be pulling a crankbait behind either a jet or tru trip.You will not be able to find any chart on how deep your crank is running if pulled behind another planer mechanism like a jet or tru trip.An exception is you can run a crank with an extremely small bill that really doesn't dive behind a dipsy or tru trip.Majority of those charters using tru trips using big boards.

[Frank]

I agree with itsbob but you can also run shollow diving cranks behind jets also