Let's say I am trolling on calm water at 2mph [gps speed] with 100' of downrigger cable out with a 10lb ball... how can u gage what depth ur ball is really running??? Is there a tool or an angle gage that helps a guy know about where it is??? Maybe a mathmatical formula to calculate actual depth??? I understand there is quite a few varibles to factor in to this equation but is there a way to get it close??? I am sick of guessing!!!
