My question is this:

When somebody tells me, "yeah, went trolling for blackmouth and caught em at 120 feet..."

What does that REALLY mean... does that mean that their downrigger was set at 120 feet? because if that was true, the angle of the line really places the trolling depth at around 110 feet or so....

So...when we're talking trolling depths, are we talking the settings on the downrigger or what?

Thanks